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Finding the Fourth Proportional to 247,074.17, 340,966.13 and 145,101.78

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Solution

The fourth proportional to 247,074.17, 340,966.13 and 145,101.78 is: 200,242.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    247,074.17 : 340,966.13 = 145,101.78 : x
  2. Step 2: Convert to fraction form
    247,074.17/340,966.13 = 145,101.78/x
  3. Step 3: Cross multiply
    247,074.17x = 340,966.13 × 145,101.78
  4. Step 4: Simplify right side
    247,074.17x = 49,474,793,597.88
  5. Step 5: Solve for x
    x = 49,474,793,597.88/247,074.17
  6. Step 6: Final answer
    x = 200,242.68

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.