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Finding the Fourth Proportional to 67,999.20, 102,013.20 and 20,610.40

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Solution

The fourth proportional to 67,999.20, 102,013.20 and 20,610.40 is: 30,919.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,999.20 : 102,013.20 = 20,610.40 : x
  2. Step 2: Convert to fraction form
    67,999.20/102,013.20 = 20,610.40/x
  3. Step 3: Cross multiply
    67,999.20x = 102,013.20 × 20,610.40
  4. Step 4: Simplify right side
    67,999.20x = 2,102,532,857.28
  5. Step 5: Solve for x
    x = 2,102,532,857.28/67,999.20
  6. Step 6: Final answer
    x = 30,919.96

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1.5x scale

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.