Home / 128,857,312,986.69-177,828,603,336.33-71,764,614,328.30

Finding the Fourth Proportional to 128,857,312,986.69, 177,828,603,336.33 and 71,764,614,328.30

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Solution

The fourth proportional to 128,857,312,986.69, 177,828,603,336.33 and 71,764,614,328.30 is: 99,038,237,249.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,857,312,986.69 : 177,828,603,336.33 = 71,764,614,328.30 : x
  2. Step 2: Convert to fraction form
    128,857,312,986.69/177,828,603,336.33 = 71,764,614,328.30/x
  3. Step 3: Cross multiply
    128,857,312,986.69x = 177,828,603,336.33 × 71,764,614,328.30
  4. Step 4: Simplify right side
    128,857,312,986.69x = 12,761,801,134,971,964,882,944
  5. Step 5: Solve for x
    x = 12,761,801,134,971,964,882,944/128,857,312,986.69
  6. Step 6: Final answer
    x = 99,038,237,249.99

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.