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Finding the Fourth Proportional to 123,385.60, 185,121.60 and 53,286.40

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Solution

The fourth proportional to 123,385.60, 185,121.60 and 53,286.40 is: 79,948.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,385.60 : 185,121.60 = 53,286.40 : x
  2. Step 2: Convert to fraction form
    123,385.60/185,121.60 = 53,286.40/x
  3. Step 3: Cross multiply
    123,385.60x = 185,121.60 × 53,286.40
  4. Step 4: Simplify right side
    123,385.60x = 9,864,463,626.24
  5. Step 5: Solve for x
    x = 9,864,463,626.24/123,385.60
  6. Step 6: Final answer
    x = 79,948.26

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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.