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Finding the Fourth Proportional to 247,487.20, 371,230.80 and 89,720.80

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Solution

The fourth proportional to 247,487.20, 371,230.80 and 89,720.80 is: 134,581.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    247,487.20 : 371,230.80 = 89,720.80 : x
  2. Step 2: Convert to fraction form
    247,487.20/371,230.80 = 89,720.80/x
  3. Step 3: Cross multiply
    247,487.20x = 371,230.80 × 89,720.80
  4. Step 4: Simplify right side
    247,487.20x = 33,307,124,360.64
  5. Step 5: Solve for x
    x = 33,307,124,360.64/247,487.20
  6. Step 6: Final answer
    x = 134,581.20

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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.