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Finding the Fourth Proportional to 75,262.60, 112,938.70 and 28,520.20

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Solution

The fourth proportional to 75,262.60, 112,938.70 and 28,520.20 is: 42,797.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    75,262.60 : 112,938.70 = 28,520.20 : x
  2. Step 2: Convert to fraction form
    75,262.60/112,938.70 = 28,520.20/x
  3. Step 3: Cross multiply
    75,262.60x = 112,938.70 × 28,520.20
  4. Step 4: Simplify right side
    75,262.60x = 3,221,034,311.74
  5. Step 5: Solve for x
    x = 3,221,034,311.74/75,262.60
  6. Step 6: Final answer
    x = 42,797.28

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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.