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Finding the Fourth Proportional to 67,615.08, 101,424.15 and 20,868

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Solution

The fourth proportional to 67,615.08, 101,424.15 and 20,868 is: 31,302.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,615.08 : 101,424.15 = 20,868 : x
  2. Step 2: Convert to fraction form
    67,615.08/101,424.15 = 20,868/x
  3. Step 3: Cross multiply
    67,615.08x = 101,424.15 × 20,868
  4. Step 4: Simplify right side
    67,615.08x = 2,116,519,162.20
  5. Step 5: Solve for x
    x = 2,116,519,162.20/67,615.08
  6. Step 6: Final answer
    x = 31,302.47

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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.