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Finding the Fourth Proportional to 108,498.90, 162,724.05 and 71,319.90

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Solution

The fourth proportional to 108,498.90, 162,724.05 and 71,319.90 is: 106,963.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,498.90 : 162,724.05 = 71,319.90 : x
  2. Step 2: Convert to fraction form
    108,498.90/162,724.05 = 71,319.90/x
  3. Step 3: Cross multiply
    108,498.90x = 162,724.05 × 71,319.90
  4. Step 4: Simplify right side
    108,498.90x = 11,605,462,973.60
  5. Step 5: Solve for x
    x = 11,605,462,973.60/108,498.90
  6. Step 6: Final answer
    x = 106,963.88

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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.