Home / 129,073.08-178,118.52-71,712.66

Finding the Fourth Proportional to 129,073.08, 178,118.52 and 71,712.66

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Solution

The fourth proportional to 129,073.08, 178,118.52 and 71,712.66 is: 98,962.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,073.08 : 178,118.52 = 71,712.66 : x
  2. Step 2: Convert to fraction form
    129,073.08/178,118.52 = 71,712.66/x
  3. Step 3: Cross multiply
    129,073.08x = 178,118.52 × 71,712.66
  4. Step 4: Simplify right side
    129,073.08x = 12,773,352,864.46
  5. Step 5: Solve for x
    x = 12,773,352,864.46/129,073.08
  6. Step 6: Final answer
    x = 98,962.18

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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.