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Finding the Fourth Proportional to 65,398.59, 90,248.36 and 38,179.89

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Solution

The fourth proportional to 65,398.59, 90,248.36 and 38,179.89 is: 52,687.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,398.59 : 90,248.36 = 38,179.89 : x
  2. Step 2: Convert to fraction form
    65,398.59/90,248.36 = 38,179.89/x
  3. Step 3: Cross multiply
    65,398.59x = 90,248.36 × 38,179.89
  4. Step 4: Simplify right side
    65,398.59x = 3,445,672,266.58
  5. Step 5: Solve for x
    x = 3,445,672,266.58/65,398.59
  6. Step 6: Final answer
    x = 52,687.26

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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.