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Finding the Fourth Proportional to 126,677.80, 189,989 and 42,449.92

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Solution

The fourth proportional to 126,677.80, 189,989 and 42,449.92 is: 63,665.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,677.80 : 189,989 = 42,449.92 : x
  2. Step 2: Convert to fraction form
    126,677.80/189,989 = 42,449.92/x
  3. Step 3: Cross multiply
    126,677.80x = 189,989 × 42,449.92
  4. Step 4: Simplify right side
    126,677.80x = 8,065,017,850.88
  5. Step 5: Solve for x
    x = 8,065,017,850.88/126,677.80
  6. Step 6: Final answer
    x = 63,665.60

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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.