Home / 128,371.92-177,139.61-71,002.12

Finding the Fourth Proportional to 128,371.92, 177,139.61 and 71,002.12

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Solution

The fourth proportional to 128,371.92, 177,139.61 and 71,002.12 is: 97,975.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,371.92 : 177,139.61 = 71,002.12 : x
  2. Step 2: Convert to fraction form
    128,371.92/177,139.61 = 71,002.12/x
  3. Step 3: Cross multiply
    128,371.92x = 177,139.61 × 71,002.12
  4. Step 4: Simplify right side
    128,371.92x = 12,577,287,845.97
  5. Step 5: Solve for x
    x = 12,577,287,845.97/128,371.92
  6. Step 6: Final answer
    x = 97,975.39

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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.