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Finding the Fourth Proportional to 247,635.20, 371,431.20 and 81,423.20

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Solution

The fourth proportional to 247,635.20, 371,431.20 and 81,423.20 is: 122,127.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    247,635.20 : 371,431.20 = 81,423.20 : x
  2. Step 2: Convert to fraction form
    247,635.20/371,431.20 = 81,423.20/x
  3. Step 3: Cross multiply
    247,635.20x = 371,431.20 × 81,423.20
  4. Step 4: Simplify right side
    247,635.20x = 30,243,116,883.84
  5. Step 5: Solve for x
    x = 30,243,116,883.84/247,635.20
  6. Step 6: Final answer
    x = 122,127.70

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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.