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Finding the Fourth Proportional to 125,106.94, 187,189.56 and 87,739.95

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Solution

The fourth proportional to 125,106.94, 187,189.56 and 87,739.95 is: 131,279.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,106.94 : 187,189.56 = 87,739.95 : x
  2. Step 2: Convert to fraction form
    125,106.94/187,189.56 = 87,739.95/x
  3. Step 3: Cross multiply
    125,106.94x = 187,189.56 × 87,739.95
  4. Step 4: Simplify right side
    125,106.94x = 16,424,002,634.92
  5. Step 5: Solve for x
    x = 16,424,002,634.92/125,106.94
  6. Step 6: Final answer
    x = 131,279.71

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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.