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Finding the Fourth Proportional to 67,785.02, 101,677.02 and 20,399.90

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Solution

The fourth proportional to 67,785.02, 101,677.02 and 20,399.90 is: 30,599.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,785.02 : 101,677.02 = 20,399.90 : x
  2. Step 2: Convert to fraction form
    67,785.02/101,677.02 = 20,399.90/x
  3. Step 3: Cross multiply
    67,785.02x = 101,677.02 × 20,399.90
  4. Step 4: Simplify right side
    67,785.02x = 2,074,201,142.10
  5. Step 5: Solve for x
    x = 2,074,201,142.10/67,785.02
  6. Step 6: Final answer
    x = 30,599.70

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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.