Home / 129,607.28-178,860-72,245.00

Finding the Fourth Proportional to 129,607.28, 178,860 and 72,245.00

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Solution

The fourth proportional to 129,607.28, 178,860 and 72,245.00 is: 99,699.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,607.28 : 178,860 = 72,245.00 : x
  2. Step 2: Convert to fraction form
    129,607.28/178,860 = 72,245.00/x
  3. Step 3: Cross multiply
    129,607.28x = 178,860 × 72,245.00
  4. Step 4: Simplify right side
    129,607.28x = 12,921,739,805.70
  5. Step 5: Solve for x
    x = 12,921,739,805.70/129,607.28
  6. Step 6: Final answer
    x = 99,699.19

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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.