Home / 143,344.82-197,818.20-78,816.78

Finding the Fourth Proportional to 143,344.82, 197,818.20 and 78,816.78

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Solution

The fourth proportional to 143,344.82, 197,818.20 and 78,816.78 is: 108,768.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,344.82 : 197,818.20 = 78,816.78 : x
  2. Step 2: Convert to fraction form
    143,344.82/197,818.20 = 78,816.78/x
  3. Step 3: Cross multiply
    143,344.82x = 197,818.20 × 78,816.78
  4. Step 4: Simplify right side
    143,344.82x = 15,591,393,549.40
  5. Step 5: Solve for x
    x = 15,591,393,549.40/143,344.82
  6. Step 6: Final answer
    x = 108,768.45

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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.