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Finding the Fourth Proportional to 392,042.88, 587,994.03 and 103,856.43

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Solution

The fourth proportional to 392,042.88, 587,994.03 and 103,856.43 is: 155,766.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    392,042.88 : 587,994.03 = 103,856.43 : x
  2. Step 2: Convert to fraction form
    392,042.88/587,994.03 = 103,856.43/x
  3. Step 3: Cross multiply
    392,042.88x = 587,994.03 × 103,856.43
  4. Step 4: Simplify right side
    392,042.88x = 61,066,960,817.11
  5. Step 5: Solve for x
    x = 61,066,960,817.11/392,042.88
  6. Step 6: Final answer
    x = 155,766.02

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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.