Home / 108,431.12-162,387.32-68,864.40

Finding the Fourth Proportional to 108,431.12, 162,387.32 and 68,864.40

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Solution

The fourth proportional to 108,431.12, 162,387.32 and 68,864.40 is: 103,131.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,431.12 : 162,387.32 = 68,864.40 : x
  2. Step 2: Convert to fraction form
    108,431.12/162,387.32 = 68,864.40/x
  3. Step 3: Cross multiply
    108,431.12x = 162,387.32 × 68,864.40
  4. Step 4: Simplify right side
    108,431.12x = 11,182,705,359.41
  5. Step 5: Solve for x
    x = 11,182,705,359.41/108,431.12
  6. Step 6: Final answer
    x = 103,131.88

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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.