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Finding the Fourth Proportional to 61,596.61, 85,039.95 and 40,412.86

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Solution

The fourth proportional to 61,596.61, 85,039.95 and 40,412.86 is: 55,793.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,596.61 : 85,039.95 = 40,412.86 : x
  2. Step 2: Convert to fraction form
    61,596.61/85,039.95 = 40,412.86/x
  3. Step 3: Cross multiply
    61,596.61x = 85,039.95 × 40,412.86
  4. Step 4: Simplify right side
    61,596.61x = 3,436,707,593.76
  5. Step 5: Solve for x
    x = 3,436,707,593.76/61,596.61
  6. Step 6: Final answer
    x = 55,793.78

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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.