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Finding the Fourth Proportional to 108,689.80, 162,859.74 and 67,049.32

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Solution

The fourth proportional to 108,689.80, 162,859.74 and 67,049.32 is: 100,466.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,689.80 : 162,859.74 = 67,049.32 : x
  2. Step 2: Convert to fraction form
    108,689.80/162,859.74 = 67,049.32/x
  3. Step 3: Cross multiply
    108,689.80x = 162,859.74 × 67,049.32
  4. Step 4: Simplify right side
    108,689.80x = 10,919,634,822.38
  5. Step 5: Solve for x
    x = 10,919,634,822.38/108,689.80
  6. Step 6: Final answer
    x = 100,466.05

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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.