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Finding the Fourth Proportional to 124,761.40, 187,142.10 and 45,859.30

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Solution

The fourth proportional to 124,761.40, 187,142.10 and 45,859.30 is: 68,788.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,761.40 : 187,142.10 = 45,859.30 : x
  2. Step 2: Convert to fraction form
    124,761.40/187,142.10 = 45,859.30/x
  3. Step 3: Cross multiply
    124,761.40x = 187,142.10 × 45,859.30
  4. Step 4: Simplify right side
    124,761.40x = 8,582,205,706.53
  5. Step 5: Solve for x
    x = 8,582,205,706.53/124,761.40
  6. Step 6: Final answer
    x = 68,788.95

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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.