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Finding the Fourth Proportional to 42,360.88, 63,500 and 20,168.29

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Solution

The fourth proportional to 42,360.88, 63,500 and 20,168.29 is: 30,232.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,360.88 : 63,500 = 20,168.29 : x
  2. Step 2: Convert to fraction form
    42,360.88/63,500 = 20,168.29/x
  3. Step 3: Cross multiply
    42,360.88x = 63,500 × 20,168.29
  4. Step 4: Simplify right side
    42,360.88x = 1,280,686,415
  5. Step 5: Solve for x
    x = 1,280,686,415/42,360.88
  6. Step 6: Final answer
    x = 30,232.76

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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.