Home / 129,587.28-178,832.52-72,231.36

Finding the Fourth Proportional to 129,587.28, 178,832.52 and 72,231.36

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Solution

The fourth proportional to 129,587.28, 178,832.52 and 72,231.36 is: 99,680.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,587.28 : 178,832.52 = 72,231.36 : x
  2. Step 2: Convert to fraction form
    129,587.28/178,832.52 = 72,231.36/x
  3. Step 3: Cross multiply
    129,587.28x = 178,832.52 × 72,231.36
  4. Step 4: Simplify right side
    129,587.28x = 12,917,316,131.83
  5. Step 5: Solve for x
    x = 12,917,316,131.83/129,587.28
  6. Step 6: Final answer
    x = 99,680.43

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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.