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Finding the Fourth Proportional to 108,614.80, 162,943.80 and 91,205.20

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Solution

The fourth proportional to 108,614.80, 162,943.80 and 91,205.20 is: 136,825.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,614.80 : 162,943.80 = 91,205.20 : x
  2. Step 2: Convert to fraction form
    108,614.80/162,943.80 = 91,205.20/x
  3. Step 3: Cross multiply
    108,614.80x = 162,943.80 × 91,205.20
  4. Step 4: Simplify right side
    108,614.80x = 14,861,321,867.76
  5. Step 5: Solve for x
    x = 14,861,321,867.76/108,614.80
  6. Step 6: Final answer
    x = 136,825.94

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.