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Finding the Fourth Proportional to 40,498, 60,778.32 and 28,105

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Solution

The fourth proportional to 40,498, 60,778.32 and 28,105 is: 42,179.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,498 : 60,778.32 = 28,105 : x
  2. Step 2: Convert to fraction form
    40,498/60,778.32 = 28,105/x
  3. Step 3: Cross multiply
    40,498x = 60,778.32 × 28,105
  4. Step 4: Simplify right side
    40,498x = 1,708,174,683.60
  5. Step 5: Solve for x
    x = 1,708,174,683.60/40,498
  6. Step 6: Final answer
    x = 42,179.24

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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.