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Finding the Fourth Proportional to 129,005.00, 178,027.34 and 71,644.47

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Solution

The fourth proportional to 129,005.00, 178,027.34 and 71,644.47 is: 98,869.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,005.00 : 178,027.34 = 71,644.47 : x
  2. Step 2: Convert to fraction form
    129,005.00/178,027.34 = 71,644.47/x
  3. Step 3: Cross multiply
    129,005.00x = 178,027.34 × 71,644.47
  4. Step 4: Simplify right side
    129,005.00x = 12,754,675,500.59
  5. Step 5: Solve for x
    x = 12,754,675,500.59/129,005.00
  6. Step 6: Final answer
    x = 98,869.62

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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.