Home / 128,857,312,989.21-177,828,603,339.81-71,764,614,330.83

Finding the Fourth Proportional to 128,857,312,989.21, 177,828,603,339.81 and 71,764,614,330.83

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Solution

The fourth proportional to 128,857,312,989.21, 177,828,603,339.81 and 71,764,614,330.83 is: 99,038,237,253.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,857,312,989.21 : 177,828,603,339.81 = 71,764,614,330.83 : x
  2. Step 2: Convert to fraction form
    128,857,312,989.21/177,828,603,339.81 = 71,764,614,330.83/x
  3. Step 3: Cross multiply
    128,857,312,989.21x = 177,828,603,339.81 × 71,764,614,330.83
  4. Step 4: Simplify right side
    128,857,312,989.21x = 12,761,801,135,670,723,346,432
  5. Step 5: Solve for x
    x = 12,761,801,135,670,723,346,432/128,857,312,989.21
  6. Step 6: Final answer
    x = 99,038,237,253.48

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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.