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Finding the Fourth Proportional to 123,490.91, 170,427.47 and 69,787.08

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Solution

The fourth proportional to 123,490.91, 170,427.47 and 69,787.08 is: 96,311.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,490.91 : 170,427.47 = 69,787.08 : x
  2. Step 2: Convert to fraction form
    123,490.91/170,427.47 = 69,787.08/x
  3. Step 3: Cross multiply
    123,490.91x = 170,427.47 × 69,787.08
  4. Step 4: Simplify right side
    123,490.91x = 11,893,635,134.15
  5. Step 5: Solve for x
    x = 11,893,635,134.15/123,490.91
  6. Step 6: Final answer
    x = 96,311.83

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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.