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Finding the Fourth Proportional to 67,681.98, 101,532.69 and 20,938.50

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Solution

The fourth proportional to 67,681.98, 101,532.69 and 20,938.50 is: 31,410.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,681.98 : 101,532.69 = 20,938.50 : x
  2. Step 2: Convert to fraction form
    67,681.98/101,532.69 = 20,938.50/x
  3. Step 3: Cross multiply
    67,681.98x = 101,532.69 × 20,938.50
  4. Step 4: Simplify right side
    67,681.98x = 2,125,942,229.57
  5. Step 5: Solve for x
    x = 2,125,942,229.57/67,681.98
  6. Step 6: Final answer
    x = 31,410.76

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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.