Home / 129,319.92-178,461.45-72,731.25

Finding the Fourth Proportional to 129,319.92, 178,461.45 and 72,731.25

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Solution

The fourth proportional to 129,319.92, 178,461.45 and 72,731.25 is: 100,369.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,319.92 : 178,461.45 = 72,731.25 : x
  2. Step 2: Convert to fraction form
    129,319.92/178,461.45 = 72,731.25/x
  3. Step 3: Cross multiply
    129,319.92x = 178,461.45 × 72,731.25
  4. Step 4: Simplify right side
    129,319.92x = 12,979,724,335.31
  5. Step 5: Solve for x
    x = 12,979,724,335.31/129,319.92
  6. Step 6: Final answer
    x = 100,369.10

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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.