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Finding the Fourth Proportional to 67,615.90, 101,433.45 and 20,863.90

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Solution

The fourth proportional to 67,615.90, 101,433.45 and 20,863.90 is: 31,298.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,615.90 : 101,433.45 = 20,863.90 : x
  2. Step 2: Convert to fraction form
    67,615.90/101,433.45 = 20,863.90/x
  3. Step 3: Cross multiply
    67,615.90x = 101,433.45 × 20,863.90
  4. Step 4: Simplify right side
    67,615.90x = 2,116,297,357.46
  5. Step 5: Solve for x
    x = 2,116,297,357.46/67,615.90
  6. Step 6: Final answer
    x = 31,298.81

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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.