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Finding the Fourth Proportional to 99,787.80, 149,703.30 and 29,674.20

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Solution

The fourth proportional to 99,787.80, 149,703.30 and 29,674.20 is: 44,517.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,787.80 : 149,703.30 = 29,674.20 : x
  2. Step 2: Convert to fraction form
    99,787.80/149,703.30 = 29,674.20/x
  3. Step 3: Cross multiply
    99,787.80x = 149,703.30 × 29,674.20
  4. Step 4: Simplify right side
    99,787.80x = 4,442,325,664.86
  5. Step 5: Solve for x
    x = 4,442,325,664.86/99,787.80
  6. Step 6: Final answer
    x = 44,517.72

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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.