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Finding the Fourth Proportional to 109,990.75, 151,787.33 and 59,689.75

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Solution

The fourth proportional to 109,990.75, 151,787.33 and 59,689.75 is: 82,371.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,990.75 : 151,787.33 = 59,689.75 : x
  2. Step 2: Convert to fraction form
    109,990.75/151,787.33 = 59,689.75/x
  3. Step 3: Cross multiply
    109,990.75x = 151,787.33 × 59,689.75
  4. Step 4: Simplify right side
    109,990.75x = 9,060,147,780.87
  5. Step 5: Solve for x
    x = 9,060,147,780.87/109,990.75
  6. Step 6: Final answer
    x = 82,371.91

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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.