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Finding the Fourth Proportional to 87,448.20, 120,675.87 and 49,209.87

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Solution

The fourth proportional to 87,448.20, 120,675.87 and 49,209.87 is: 67,908.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,448.20 : 120,675.87 = 49,209.87 : x
  2. Step 2: Convert to fraction form
    87,448.20/120,675.87 = 49,209.87/x
  3. Step 3: Cross multiply
    87,448.20x = 120,675.87 × 49,209.87
  4. Step 4: Simplify right side
    87,448.20x = 5,938,443,874.84
  5. Step 5: Solve for x
    x = 5,938,443,874.84/87,448.20
  6. Step 6: Final answer
    x = 67,908.13

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.