Home / 128,012.76-176,666.10-71,425.36

Finding the Fourth Proportional to 128,012.76, 176,666.10 and 71,425.36

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Solution

The fourth proportional to 128,012.76, 176,666.10 and 71,425.36 is: 98,571.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,012.76 : 176,666.10 = 71,425.36 : x
  2. Step 2: Convert to fraction form
    128,012.76/176,666.10 = 71,425.36/x
  3. Step 3: Cross multiply
    128,012.76x = 176,666.10 × 71,425.36
  4. Step 4: Simplify right side
    128,012.76x = 12,618,439,792.30
  5. Step 5: Solve for x
    x = 12,618,439,792.30/128,012.76
  6. Step 6: Final answer
    x = 98,571.73

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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.