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Finding the Fourth Proportional to 78,757.44, 108,687.51 and 42,948.12

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Solution

The fourth proportional to 78,757.44, 108,687.51 and 42,948.12 is: 59,269.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,757.44 : 108,687.51 = 42,948.12 : x
  2. Step 2: Convert to fraction form
    78,757.44/108,687.51 = 42,948.12/x
  3. Step 3: Cross multiply
    78,757.44x = 108,687.51 × 42,948.12
  4. Step 4: Simplify right side
    78,757.44x = 4,667,924,221.98
  5. Step 5: Solve for x
    x = 4,667,924,221.98/78,757.44
  6. Step 6: Final answer
    x = 59,269.63

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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.