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Finding the Fourth Proportional to 89,701.80, 123,787.16 and 49,415.59

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Solution

The fourth proportional to 89,701.80, 123,787.16 and 49,415.59 is: 68,192.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,701.80 : 123,787.16 = 49,415.59 : x
  2. Step 2: Convert to fraction form
    89,701.80/123,787.16 = 49,415.59/x
  3. Step 3: Cross multiply
    89,701.80x = 123,787.16 × 49,415.59
  4. Step 4: Simplify right side
    89,701.80x = 6,117,016,125.92
  5. Step 5: Solve for x
    x = 6,117,016,125.92/89,701.80
  6. Step 6: Final answer
    x = 68,192.79

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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.