Home / 129,207.02-178,306.35-72,617.90

Finding the Fourth Proportional to 129,207.02, 178,306.35 and 72,617.90

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Solution

The fourth proportional to 129,207.02, 178,306.35 and 72,617.90 is: 100,213.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,207.02 : 178,306.35 = 72,617.90 : x
  2. Step 2: Convert to fraction form
    129,207.02/178,306.35 = 72,617.90/x
  3. Step 3: Cross multiply
    129,207.02x = 178,306.35 × 72,617.90
  4. Step 4: Simplify right side
    129,207.02x = 12,948,232,693.67
  5. Step 5: Solve for x
    x = 12,948,232,693.67/129,207.02
  6. Step 6: Final answer
    x = 100,213.07

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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.