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Finding the Fourth Proportional to 67,616.58, 101,426.40 and 20,869.50

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Solution

The fourth proportional to 67,616.58, 101,426.40 and 20,869.50 is: 31,304.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,616.58 : 101,426.40 = 20,869.50 : x
  2. Step 2: Convert to fraction form
    67,616.58/101,426.40 = 20,869.50/x
  3. Step 3: Cross multiply
    67,616.58x = 101,426.40 × 20,869.50
  4. Step 4: Simplify right side
    67,616.58x = 2,116,718,254.80
  5. Step 5: Solve for x
    x = 2,116,718,254.80/67,616.58
  6. Step 6: Final answer
    x = 31,304.72

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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.