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Finding the Fourth Proportional to 65,755.60, 90,743.36 and 60,732.80

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Solution

The fourth proportional to 65,755.60, 90,743.36 and 60,732.80 is: 83,811.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,755.60 : 90,743.36 = 60,732.80 : x
  2. Step 2: Convert to fraction form
    65,755.60/90,743.36 = 60,732.80/x
  3. Step 3: Cross multiply
    65,755.60x = 90,743.36 × 60,732.80
  4. Step 4: Simplify right side
    65,755.60x = 5,511,098,334.21
  5. Step 5: Solve for x
    x = 5,511,098,334.21/65,755.60
  6. Step 6: Final answer
    x = 83,811.85

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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.