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Finding the Fourth Proportional to 125,115.95, 187,203.06 and 87,748.95

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Solution

The fourth proportional to 125,115.95, 187,203.06 and 87,748.95 is: 131,293.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,115.95 : 187,203.06 = 87,748.95 : x
  2. Step 2: Convert to fraction form
    125,115.95/187,203.06 = 87,748.95/x
  3. Step 3: Cross multiply
    125,115.95x = 187,203.06 × 87,748.95
  4. Step 4: Simplify right side
    125,115.95x = 16,426,871,951.79
  5. Step 5: Solve for x
    x = 16,426,871,951.79/125,115.95
  6. Step 6: Final answer
    x = 131,293.19

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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.