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Finding the Fourth Proportional to 41,156.68, 61,734.78 and 9,991.72

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Solution

The fourth proportional to 41,156.68, 61,734.78 and 9,991.72 is: 14,987.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    41,156.68 : 61,734.78 = 9,991.72 : x
  2. Step 2: Convert to fraction form
    41,156.68/61,734.78 = 9,991.72/x
  3. Step 3: Cross multiply
    41,156.68x = 61,734.78 × 9,991.72
  4. Step 4: Simplify right side
    41,156.68x = 616,836,636.02
  5. Step 5: Solve for x
    x = 616,836,636.02/41,156.68
  6. Step 6: Final answer
    x = 14,987.52

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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.