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Finding the Fourth Proportional to 155,956.80, 215,217.36 and 91,441.92

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Solution

The fourth proportional to 155,956.80, 215,217.36 and 91,441.92 is: 126,188.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    155,956.80 : 215,217.36 = 91,441.92 : x
  2. Step 2: Convert to fraction form
    155,956.80/215,217.36 = 91,441.92/x
  3. Step 3: Cross multiply
    155,956.80x = 215,217.36 × 91,441.92
  4. Step 4: Simplify right side
    155,956.80x = 19,679,888,615.73
  5. Step 5: Solve for x
    x = 19,679,888,615.73/155,956.80
  6. Step 6: Final answer
    x = 126,188.08

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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.