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Finding the Fourth Proportional to 247,636.20, 371,432.70 and 81,424.20

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Solution

The fourth proportional to 247,636.20, 371,432.70 and 81,424.20 is: 122,129.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    247,636.20 : 371,432.70 = 81,424.20 : x
  2. Step 2: Convert to fraction form
    247,636.20/371,432.70 = 81,424.20/x
  3. Step 3: Cross multiply
    247,636.20x = 371,432.70 × 81,424.20
  4. Step 4: Simplify right side
    247,636.20x = 30,243,610,451.34
  5. Step 5: Solve for x
    x = 30,243,610,451.34/247,636.20
  6. Step 6: Final answer
    x = 122,129.20

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1.5x scale

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.