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Finding the Fourth Proportional to 123,117.38, 169,891.78 and 69,415.60

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Solution

The fourth proportional to 123,117.38, 169,891.78 and 69,415.60 is: 95,787.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,117.38 : 169,891.78 = 69,415.60 : x
  2. Step 2: Convert to fraction form
    123,117.38/169,891.78 = 69,415.60/x
  3. Step 3: Cross multiply
    123,117.38x = 169,891.78 × 69,415.60
  4. Step 4: Simplify right side
    123,117.38x = 11,793,139,843.77
  5. Step 5: Solve for x
    x = 11,793,139,843.77/123,117.38
  6. Step 6: Final answer
    x = 95,787.77

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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.