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Finding the Fourth Proportional to 125,138.97, 187,706.90 and 30,369.95

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Solution

The fourth proportional to 125,138.97, 187,706.90 and 30,369.95 is: 45,554.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,138.97 : 187,706.90 = 30,369.95 : x
  2. Step 2: Convert to fraction form
    125,138.97/187,706.90 = 30,369.95/x
  3. Step 3: Cross multiply
    125,138.97x = 187,706.90 × 30,369.95
  4. Step 4: Simplify right side
    125,138.97x = 5,700,648,077.27
  5. Step 5: Solve for x
    x = 5,700,648,077.27/125,138.97
  6. Step 6: Final answer
    x = 45,554.54

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1.5x scale

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.