Home / 129,394.01-178,561.90-72,805.25

Finding the Fourth Proportional to 129,394.01, 178,561.90 and 72,805.25

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Solution

The fourth proportional to 129,394.01, 178,561.90 and 72,805.25 is: 100,470.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,394.01 : 178,561.90 = 72,805.25 : x
  2. Step 2: Convert to fraction form
    129,394.01/178,561.90 = 72,805.25/x
  3. Step 3: Cross multiply
    129,394.01x = 178,561.90 × 72,805.25
  4. Step 4: Simplify right side
    129,394.01x = 13,000,243,769.98
  5. Step 5: Solve for x
    x = 13,000,243,769.98/129,394.01
  6. Step 6: Final answer
    x = 100,470.21

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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.