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Finding the Fourth Proportional to 100,921.20, 151,360.20 and 44,761.20

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Solution

The fourth proportional to 100,921.20, 151,360.20 and 44,761.20 is: 67,132.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,921.20 : 151,360.20 = 44,761.20 : x
  2. Step 2: Convert to fraction form
    100,921.20/151,360.20 = 44,761.20/x
  3. Step 3: Cross multiply
    100,921.20x = 151,360.20 × 44,761.20
  4. Step 4: Simplify right side
    100,921.20x = 6,775,064,184.24
  5. Step 5: Solve for x
    x = 6,775,064,184.24/100,921.20
  6. Step 6: Final answer
    x = 67,132.22

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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.