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Finding the Fourth Proportional to 129,468.52, 178,564.26 and 84,747.88

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Solution

The fourth proportional to 129,468.52, 178,564.26 and 84,747.88 is: 116,885.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,468.52 : 178,564.26 = 84,747.88 : x
  2. Step 2: Convert to fraction form
    129,468.52/178,564.26 = 84,747.88/x
  3. Step 3: Cross multiply
    129,468.52x = 178,564.26 × 84,747.88
  4. Step 4: Simplify right side
    129,468.52x = 15,132,942,478.77
  5. Step 5: Solve for x
    x = 15,132,942,478.77/129,468.52
  6. Step 6: Final answer
    x = 116,885.11

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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.