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Finding the Fourth Proportional to 72,707.61, 109,061.42 and 22,787.70

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Solution

The fourth proportional to 72,707.61, 109,061.42 and 22,787.70 is: 34,181.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,707.61 : 109,061.42 = 22,787.70 : x
  2. Step 2: Convert to fraction form
    72,707.61/109,061.42 = 22,787.70/x
  3. Step 3: Cross multiply
    72,707.61x = 109,061.42 × 22,787.70
  4. Step 4: Simplify right side
    72,707.61x = 2,485,258,920.53
  5. Step 5: Solve for x
    x = 2,485,258,920.53/72,707.61
  6. Step 6: Final answer
    x = 34,181.55

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.