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Finding the Fourth Proportional to 108,695.04, 162,922.88 and 81,955.30

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Solution

The fourth proportional to 108,695.04, 162,922.88 and 81,955.30 is: 122,842.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,695.04 : 162,922.88 = 81,955.30 : x
  2. Step 2: Convert to fraction form
    108,695.04/162,922.88 = 81,955.30/x
  3. Step 3: Cross multiply
    108,695.04x = 162,922.88 × 81,955.30
  4. Step 4: Simplify right side
    108,695.04x = 13,352,393,507.26
  5. Step 5: Solve for x
    x = 13,352,393,507.26/108,695.04
  6. Step 6: Final answer
    x = 122,842.71

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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.