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Finding the Fourth Proportional to 41,155.68, 61,733.28 and 9,990.72

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Solution

The fourth proportional to 41,155.68, 61,733.28 and 9,990.72 is: 14,986.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    41,155.68 : 61,733.28 = 9,990.72 : x
  2. Step 2: Convert to fraction form
    41,155.68/61,733.28 = 9,990.72/x
  3. Step 3: Cross multiply
    41,155.68x = 61,733.28 × 9,990.72
  4. Step 4: Simplify right side
    41,155.68x = 616,759,915.16
  5. Step 5: Solve for x
    x = 616,759,915.16/41,155.68
  6. Step 6: Final answer
    x = 14,986.02

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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.