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Finding the Fourth Proportional to 89,504.64, 123,485.70 and 55,500.90

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Solution

The fourth proportional to 89,504.64, 123,485.70 and 55,500.90 is: 76,572.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,504.64 : 123,485.70 = 55,500.90 : x
  2. Step 2: Convert to fraction form
    89,504.64/123,485.70 = 55,500.90/x
  3. Step 3: Cross multiply
    89,504.64x = 123,485.70 × 55,500.90
  4. Step 4: Simplify right side
    89,504.64x = 6,853,567,487.13
  5. Step 5: Solve for x
    x = 6,853,567,487.13/89,504.64
  6. Step 6: Final answer
    x = 76,572.20

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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.