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Finding the Fourth Proportional to 40,251.87, 60,388.74 and 28,638.90

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Solution

The fourth proportional to 40,251.87, 60,388.74 and 28,638.90 is: 42,966.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,251.87 : 60,388.74 = 28,638.90 : x
  2. Step 2: Convert to fraction form
    40,251.87/60,388.74 = 28,638.90/x
  3. Step 3: Cross multiply
    40,251.87x = 60,388.74 × 28,638.90
  4. Step 4: Simplify right side
    40,251.87x = 1,729,467,085.99
  5. Step 5: Solve for x
    x = 1,729,467,085.99/40,251.87
  6. Step 6: Final answer
    x = 42,966.13

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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.