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Finding the Fourth Proportional to 136,620.60, 204,710.10 and 77,279.80

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Solution

The fourth proportional to 136,620.60, 204,710.10 and 77,279.80 is: 115,794.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,620.60 : 204,710.10 = 77,279.80 : x
  2. Step 2: Convert to fraction form
    136,620.60/204,710.10 = 77,279.80/x
  3. Step 3: Cross multiply
    136,620.60x = 204,710.10 × 77,279.80
  4. Step 4: Simplify right side
    136,620.60x = 15,819,955,585.98
  5. Step 5: Solve for x
    x = 15,819,955,585.98/136,620.60
  6. Step 6: Final answer
    x = 115,794.80

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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.