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Finding the Fourth Proportional to 90,459.60, 135,577.80 and 65,585.04

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Solution

The fourth proportional to 90,459.60, 135,577.80 and 65,585.04 is: 98,296.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,459.60 : 135,577.80 = 65,585.04 : x
  2. Step 2: Convert to fraction form
    90,459.60/135,577.80 = 65,585.04/x
  3. Step 3: Cross multiply
    90,459.60x = 135,577.80 × 65,585.04
  4. Step 4: Simplify right side
    90,459.60x = 8,891,875,436.11
  5. Step 5: Solve for x
    x = 8,891,875,436.11/90,459.60
  6. Step 6: Final answer
    x = 98,296.65

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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.