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Finding the Fourth Proportional to 100,577.20, 150,865.80 and 53,921.20

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Solution

The fourth proportional to 100,577.20, 150,865.80 and 53,921.20 is: 80,881.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,577.20 : 150,865.80 = 53,921.20 : x
  2. Step 2: Convert to fraction form
    100,577.20/150,865.80 = 53,921.20/x
  3. Step 3: Cross multiply
    100,577.20x = 150,865.80 × 53,921.20
  4. Step 4: Simplify right side
    100,577.20x = 8,134,864,974.96
  5. Step 5: Solve for x
    x = 8,134,864,974.96/100,577.20
  6. Step 6: Final answer
    x = 80,881.80

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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.