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Finding the Fourth Proportional to 67,750.11, 101,630.43 and 20,361.51

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Solution

The fourth proportional to 67,750.11, 101,630.43 and 20,361.51 is: 30,543.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,750.11 : 101,630.43 = 20,361.51 : x
  2. Step 2: Convert to fraction form
    67,750.11/101,630.43 = 20,361.51/x
  3. Step 3: Cross multiply
    67,750.11x = 101,630.43 × 20,361.51
  4. Step 4: Simplify right side
    67,750.11x = 2,069,349,016.75
  5. Step 5: Solve for x
    x = 2,069,349,016.75/67,750.11
  6. Step 6: Final answer
    x = 30,543.85

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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.