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Finding the Fourth Proportional to 87,042.50, 120,123.51 and 49,328.90

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Solution

The fourth proportional to 87,042.50, 120,123.51 and 49,328.90 is: 68,076.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,042.50 : 120,123.51 = 49,328.90 : x
  2. Step 2: Convert to fraction form
    87,042.50/120,123.51 = 49,328.90/x
  3. Step 3: Cross multiply
    87,042.50x = 120,123.51 × 49,328.90
  4. Step 4: Simplify right side
    87,042.50x = 5,925,560,612.44
  5. Step 5: Solve for x
    x = 5,925,560,612.44/87,042.50
  6. Step 6: Final answer
    x = 68,076.64

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1.5x scale

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.