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Finding the Fourth Proportional to 45,765.40, 68,691.30 and 28,269.40

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Solution

The fourth proportional to 45,765.40, 68,691.30 and 28,269.40 is: 42,430.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,765.40 : 68,691.30 = 28,269.40 : x
  2. Step 2: Convert to fraction form
    45,765.40/68,691.30 = 28,269.40/x
  3. Step 3: Cross multiply
    45,765.40x = 68,691.30 × 28,269.40
  4. Step 4: Simplify right side
    45,765.40x = 1,941,861,836.22
  5. Step 5: Solve for x
    x = 1,941,861,836.22/45,765.40
  6. Step 6: Final answer
    x = 42,430.78

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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.