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Finding the Fourth Proportional to 391,443.20, 587,143.13 and 107,113.34

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Solution

The fourth proportional to 391,443.20, 587,143.13 and 107,113.34 is: 160,664.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,443.20 : 587,143.13 = 107,113.34 : x
  2. Step 2: Convert to fraction form
    391,443.20/587,143.13 = 107,113.34/x
  3. Step 3: Cross multiply
    391,443.20x = 587,143.13 × 107,113.34
  4. Step 4: Simplify right side
    391,443.20x = 62,890,861,712.35
  5. Step 5: Solve for x
    x = 62,890,861,712.35/391,443.20
  6. Step 6: Final answer
    x = 160,664.08

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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.