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Finding the Fourth Proportional to 60,408.60, 90,612.90 and 38,319.90

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Solution

The fourth proportional to 60,408.60, 90,612.90 and 38,319.90 is: 57,479.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,408.60 : 90,612.90 = 38,319.90 : x
  2. Step 2: Convert to fraction form
    60,408.60/90,612.90 = 38,319.90/x
  3. Step 3: Cross multiply
    60,408.60x = 90,612.90 × 38,319.90
  4. Step 4: Simplify right side
    60,408.60x = 3,472,277,266.71
  5. Step 5: Solve for x
    x = 3,472,277,266.71/60,408.60
  6. Step 6: Final answer
    x = 57,479.85

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Similar ratio
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1.5x scale

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.