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Finding the Fourth Proportional to 65,398.72, 90,248.53 and 38,180.02

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Solution

The fourth proportional to 65,398.72, 90,248.53 and 38,180.02 is: 52,687.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,398.72 : 90,248.53 = 38,180.02 : x
  2. Step 2: Convert to fraction form
    65,398.72/90,248.53 = 38,180.02/x
  3. Step 3: Cross multiply
    65,398.72x = 90,248.53 × 38,180.02
  4. Step 4: Simplify right side
    65,398.72x = 3,445,690,038.23
  5. Step 5: Solve for x
    x = 3,445,690,038.23/65,398.72
  6. Step 6: Final answer
    x = 52,687.43

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1.5x scale

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.