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Finding the Fourth Proportional to 103,612.60, 155,418.90 and 28,732.60

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Solution

The fourth proportional to 103,612.60, 155,418.90 and 28,732.60 is: 43,098.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,612.60 : 155,418.90 = 28,732.60 : x
  2. Step 2: Convert to fraction form
    103,612.60/155,418.90 = 28,732.60/x
  3. Step 3: Cross multiply
    103,612.60x = 155,418.90 × 28,732.60
  4. Step 4: Simplify right side
    103,612.60x = 4,465,589,086.14
  5. Step 5: Solve for x
    x = 4,465,589,086.14/103,612.60
  6. Step 6: Final answer
    x = 43,098.90

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1.5x scale

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.