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Finding the Fourth Proportional to 103,660.62, 155,494.17 and 28,781.52

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Solution

The fourth proportional to 103,660.62, 155,494.17 and 28,781.52 is: 43,173.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,660.62 : 155,494.17 = 28,781.52 : x
  2. Step 2: Convert to fraction form
    103,660.62/155,494.17 = 28,781.52/x
  3. Step 3: Cross multiply
    103,660.62x = 155,494.17 × 28,781.52
  4. Step 4: Simplify right side
    103,660.62x = 4,475,358,563.74
  5. Step 5: Solve for x
    x = 4,475,358,563.74/103,660.62
  6. Step 6: Final answer
    x = 43,173.18

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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.