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Finding the Fourth Proportional to 129,632, 178,892.28 and 70,016

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Solution

The fourth proportional to 129,632, 178,892.28 and 70,016 is: 96,622.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,632 : 178,892.28 = 70,016 : x
  2. Step 2: Convert to fraction form
    129,632/178,892.28 = 70,016/x
  3. Step 3: Cross multiply
    129,632x = 178,892.28 × 70,016
  4. Step 4: Simplify right side
    129,632x = 12,525,321,876.48
  5. Step 5: Solve for x
    x = 12,525,321,876.48/129,632
  6. Step 6: Final answer
    x = 96,622.14

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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.