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Finding the Fourth Proportional to 90,657.52, 135,892.76 and 65,635.44

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Solution

The fourth proportional to 90,657.52, 135,892.76 and 65,635.44 is: 98,385.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,657.52 : 135,892.76 = 65,635.44 : x
  2. Step 2: Convert to fraction form
    90,657.52/135,892.76 = 65,635.44/x
  3. Step 3: Cross multiply
    90,657.52x = 135,892.76 × 65,635.44
  4. Step 4: Simplify right side
    90,657.52x = 8,919,381,095.41
  5. Step 5: Solve for x
    x = 8,919,381,095.41/90,657.52
  6. Step 6: Final answer
    x = 98,385.45

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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.