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Finding the Fourth Proportional to 71,287.60, 98,408.64 and 42,617.20

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Solution

The fourth proportional to 71,287.60, 98,408.64 and 42,617.20 is: 58,830.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,287.60 : 98,408.64 = 42,617.20 : x
  2. Step 2: Convert to fraction form
    71,287.60/98,408.64 = 42,617.20/x
  3. Step 3: Cross multiply
    71,287.60x = 98,408.64 × 42,617.20
  4. Step 4: Simplify right side
    71,287.60x = 4,193,900,692.61
  5. Step 5: Solve for x
    x = 4,193,900,692.61/71,287.60
  6. Step 6: Final answer
    x = 58,830.72

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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.