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Finding the Fourth Proportional to 124,981.84, 187,348.14 and 80,639.74

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Solution

The fourth proportional to 124,981.84, 187,348.14 and 80,639.74 is: 120,879.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,981.84 : 187,348.14 = 80,639.74 : x
  2. Step 2: Convert to fraction form
    124,981.84/187,348.14 = 80,639.74/x
  3. Step 3: Cross multiply
    124,981.84x = 187,348.14 × 80,639.74
  4. Step 4: Simplify right side
    124,981.84x = 15,107,704,479.44
  5. Step 5: Solve for x
    x = 15,107,704,479.44/124,981.84
  6. Step 6: Final answer
    x = 120,879.20

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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.