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Finding the Fourth Proportional to 108,663.40, 162,800.70 and 67,061.80

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Solution

The fourth proportional to 108,663.40, 162,800.70 and 67,061.80 is: 100,472.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,663.40 : 162,800.70 = 67,061.80 : x
  2. Step 2: Convert to fraction form
    108,663.40/162,800.70 = 67,061.80/x
  3. Step 3: Cross multiply
    108,663.40x = 162,800.70 × 67,061.80
  4. Step 4: Simplify right side
    108,663.40x = 10,917,707,983.26
  5. Step 5: Solve for x
    x = 10,917,707,983.26/108,663.40
  6. Step 6: Final answer
    x = 100,472.73

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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.