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Finding the Fourth Proportional to 247,212.20, 370,796.70 and 81,000.20

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Solution

The fourth proportional to 247,212.20, 370,796.70 and 81,000.20 is: 121,493.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    247,212.20 : 370,796.70 = 81,000.20 : x
  2. Step 2: Convert to fraction form
    247,212.20/370,796.70 = 81,000.20/x
  3. Step 3: Cross multiply
    247,212.20x = 370,796.70 × 81,000.20
  4. Step 4: Simplify right side
    247,212.20x = 30,034,606,859.34
  5. Step 5: Solve for x
    x = 30,034,606,859.34/247,212.20
  6. Step 6: Final answer
    x = 121,493.22

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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.