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Finding the Fourth Proportional to 508,072.50, 762,109.11 and 129,021.66

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Solution

The fourth proportional to 508,072.50, 762,109.11 and 129,021.66 is: 193,532.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    508,072.50 : 762,109.11 = 129,021.66 : x
  2. Step 2: Convert to fraction form
    508,072.50/762,109.11 = 129,021.66/x
  3. Step 3: Cross multiply
    508,072.50x = 762,109.11 × 129,021.66
  4. Step 4: Simplify right side
    508,072.50x = 98,328,582,473.32
  5. Step 5: Solve for x
    x = 98,328,582,473.32/508,072.50
  6. Step 6: Final answer
    x = 193,532.58

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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.