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Finding the Fourth Proportional to 83,124.60, 124,601.85 and 40,939.80

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Solution

The fourth proportional to 83,124.60, 124,601.85 and 40,939.80 is: 61,367.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,124.60 : 124,601.85 = 40,939.80 : x
  2. Step 2: Convert to fraction form
    83,124.60/124,601.85 = 40,939.80/x
  3. Step 3: Cross multiply
    83,124.60x = 124,601.85 × 40,939.80
  4. Step 4: Simplify right side
    83,124.60x = 5,101,174,818.63
  5. Step 5: Solve for x
    x = 5,101,174,818.63/83,124.60
  6. Step 6: Final answer
    x = 61,367.81

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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.