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Finding the Fourth Proportional to 138,636.60, 207,954.23 and 54,337.20

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Solution

The fourth proportional to 138,636.60, 207,954.23 and 54,337.20 is: 81,505.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,636.60 : 207,954.23 = 54,337.20 : x
  2. Step 2: Convert to fraction form
    138,636.60/207,954.23 = 54,337.20/x
  3. Step 3: Cross multiply
    138,636.60x = 207,954.23 × 54,337.20
  4. Step 4: Simplify right side
    138,636.60x = 11,299,650,314.67
  5. Step 5: Solve for x
    x = 11,299,650,314.67/138,636.60
  6. Step 6: Final answer
    x = 81,505.54

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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.