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Finding the Fourth Proportional to 73,158.60, 109,672.20 and 28,815.60

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Solution

The fourth proportional to 73,158.60, 109,672.20 and 28,815.60 is: 43,197.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,158.60 : 109,672.20 = 28,815.60 : x
  2. Step 2: Convert to fraction form
    73,158.60/109,672.20 = 28,815.60/x
  3. Step 3: Cross multiply
    73,158.60x = 109,672.20 × 28,815.60
  4. Step 4: Simplify right side
    73,158.60x = 3,160,270,246.32
  5. Step 5: Solve for x
    x = 3,160,270,246.32/73,158.60
  6. Step 6: Final answer
    x = 43,197.52

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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.