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Finding the Fourth Proportional to 71,373.60, 107,051.85 and 18,787.23

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Solution

The fourth proportional to 71,373.60, 107,051.85 and 18,787.23 is: 28,178.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,373.60 : 107,051.85 = 18,787.23 : x
  2. Step 2: Convert to fraction form
    71,373.60/107,051.85 = 18,787.23/x
  3. Step 3: Cross multiply
    71,373.60x = 107,051.85 × 18,787.23
  4. Step 4: Simplify right side
    71,373.60x = 2,011,207,727.88
  5. Step 5: Solve for x
    x = 2,011,207,727.88/71,373.60
  6. Step 6: Final answer
    x = 28,178.59

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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.