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Finding the Fourth Proportional to 159,642.70, 220,306.95 and 91,664.11

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Solution

The fourth proportional to 159,642.70, 220,306.95 and 91,664.11 is: 126,496.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,642.70 : 220,306.95 = 91,664.11 : x
  2. Step 2: Convert to fraction form
    159,642.70/220,306.95 = 91,664.11/x
  3. Step 3: Cross multiply
    159,642.70x = 220,306.95 × 91,664.11
  4. Step 4: Simplify right side
    159,642.70x = 20,194,240,498.56
  5. Step 5: Solve for x
    x = 20,194,240,498.56/159,642.70
  6. Step 6: Final answer
    x = 126,496.49

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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.