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Finding the Fourth Proportional to 163,311.12, 225,351.90 and 91,699

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Solution

The fourth proportional to 163,311.12, 225,351.90 and 91,699 is: 126,534.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    163,311.12 : 225,351.90 = 91,699 : x
  2. Step 2: Convert to fraction form
    163,311.12/225,351.90 = 91,699/x
  3. Step 3: Cross multiply
    163,311.12x = 225,351.90 × 91,699
  4. Step 4: Simplify right side
    163,311.12x = 20,664,543,878.10
  5. Step 5: Solve for x
    x = 20,664,543,878.10/163,311.12
  6. Step 6: Final answer
    x = 126,534.82

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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.