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Finding the Fourth Proportional to 123,154.80, 169,944.24 and 80,639.52

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Solution

The fourth proportional to 123,154.80, 169,944.24 and 80,639.52 is: 111,276.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,154.80 : 169,944.24 = 80,639.52 : x
  2. Step 2: Convert to fraction form
    123,154.80/169,944.24 = 80,639.52/x
  3. Step 3: Cross multiply
    123,154.80x = 169,944.24 × 80,639.52
  4. Step 4: Simplify right side
    123,154.80x = 13,704,221,940.36
  5. Step 5: Solve for x
    x = 13,704,221,940.36/123,154.80
  6. Step 6: Final answer
    x = 111,276.39

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1.5x scale

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.