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Finding the Fourth Proportional to 65,488.74, 90,358.68 and 38,249.40

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Solution

The fourth proportional to 65,488.74, 90,358.68 and 38,249.40 is: 52,774.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,488.74 : 90,358.68 = 38,249.40 : x
  2. Step 2: Convert to fraction form
    65,488.74/90,358.68 = 38,249.40/x
  3. Step 3: Cross multiply
    65,488.74x = 90,358.68 × 38,249.40
  4. Step 4: Simplify right side
    65,488.74x = 3,456,165,294.79
  5. Step 5: Solve for x
    x = 3,456,165,294.79/65,488.74
  6. Step 6: Final answer
    x = 52,774.95

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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.