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Finding the Fourth Proportional to 158,857.20, 219,228.04 and 91,789.20

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Solution

The fourth proportional to 158,857.20, 219,228.04 and 91,789.20 is: 126,672.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,857.20 : 219,228.04 = 91,789.20 : x
  2. Step 2: Convert to fraction form
    158,857.20/219,228.04 = 91,789.20/x
  3. Step 3: Cross multiply
    158,857.20x = 219,228.04 × 91,789.20
  4. Step 4: Simplify right side
    158,857.20x = 20,122,766,409.17
  5. Step 5: Solve for x
    x = 20,122,766,409.17/158,857.20
  6. Step 6: Final answer
    x = 126,672.05

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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.