Home / 129,355.76-178,510.89-72,767.13

Finding the Fourth Proportional to 129,355.76, 178,510.89 and 72,767.13

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Solution

The fourth proportional to 129,355.76, 178,510.89 and 72,767.13 is: 100,418.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,355.76 : 178,510.89 = 72,767.13 : x
  2. Step 2: Convert to fraction form
    129,355.76/178,510.89 = 72,767.13/x
  3. Step 3: Cross multiply
    129,355.76x = 178,510.89 × 72,767.13
  4. Step 4: Simplify right side
    129,355.76x = 12,989,725,139.05
  5. Step 5: Solve for x
    x = 12,989,725,139.05/129,355.76
  6. Step 6: Final answer
    x = 100,418.61

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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.