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Finding the Fourth Proportional to 108,874.96, 163,159.28 and 86,589.42

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Solution

The fourth proportional to 108,874.96, 163,159.28 and 86,589.42 is: 129,762.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,874.96 : 163,159.28 = 86,589.42 : x
  2. Step 2: Convert to fraction form
    108,874.96/163,159.28 = 86,589.42/x
  3. Step 3: Cross multiply
    108,874.96x = 163,159.28 × 86,589.42
  4. Step 4: Simplify right side
    108,874.96x = 14,127,867,422.82
  5. Step 5: Solve for x
    x = 14,127,867,422.82/108,874.96
  6. Step 6: Final answer
    x = 129,762.32

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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.