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Finding the Fourth Proportional to 90,766.60, 135,881.10 and 67,496.20

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Solution

The fourth proportional to 90,766.60, 135,881.10 and 67,496.20 is: 101,044.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,766.60 : 135,881.10 = 67,496.20 : x
  2. Step 2: Convert to fraction form
    90,766.60/135,881.10 = 67,496.20/x
  3. Step 3: Cross multiply
    90,766.60x = 135,881.10 × 67,496.20
  4. Step 4: Simplify right side
    90,766.60x = 9,171,457,901.82
  5. Step 5: Solve for x
    x = 9,171,457,901.82/90,766.60
  6. Step 6: Final answer
    x = 101,044.41

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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.