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Finding the Fourth Proportional to 158,380.71, 218,565.36 and 86,760.70

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Solution

The fourth proportional to 158,380.71, 218,565.36 and 86,760.70 is: 119,729.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,380.71 : 218,565.36 = 86,760.70 : x
  2. Step 2: Convert to fraction form
    158,380.71/218,565.36 = 86,760.70/x
  3. Step 3: Cross multiply
    158,380.71x = 218,565.36 × 86,760.70
  4. Step 4: Simplify right side
    158,380.71x = 18,962,883,629.35
  5. Step 5: Solve for x
    x = 18,962,883,629.35/158,380.71
  6. Step 6: Final answer
    x = 119,729.76

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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.