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Finding the Fourth Proportional to 137,654.40, 206,430.40 and 54,531.20

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Solution

The fourth proportional to 137,654.40, 206,430.40 and 54,531.20 is: 81,776.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,654.40 : 206,430.40 = 54,531.20 : x
  2. Step 2: Convert to fraction form
    137,654.40/206,430.40 = 54,531.20/x
  3. Step 3: Cross multiply
    137,654.40x = 206,430.40 × 54,531.20
  4. Step 4: Simplify right side
    137,654.40x = 11,256,897,428.48
  5. Step 5: Solve for x
    x = 11,256,897,428.48/137,654.40
  6. Step 6: Final answer
    x = 81,776.52

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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.