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Finding the Fourth Proportional to 247,990.16, 371,994.96 and 129,581.12

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Solution

The fourth proportional to 247,990.16, 371,994.96 and 129,581.12 is: 194,376.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    247,990.16 : 371,994.96 = 129,581.12 : x
  2. Step 2: Convert to fraction form
    247,990.16/371,994.96 = 129,581.12/x
  3. Step 3: Cross multiply
    247,990.16x = 371,994.96 × 129,581.12
  4. Step 4: Simplify right side
    247,990.16x = 48,203,523,551.16
  5. Step 5: Solve for x
    x = 48,203,523,551.16/247,990.16
  6. Step 6: Final answer
    x = 194,376.76

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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.