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Finding the Fourth Proportional to 100,933.20, 151,472.70 and 56,512.80

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Solution

The fourth proportional to 100,933.20, 151,472.70 and 56,512.80 is: 84,810.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,933.20 : 151,472.70 = 56,512.80 : x
  2. Step 2: Convert to fraction form
    100,933.20/151,472.70 = 56,512.80/x
  3. Step 3: Cross multiply
    100,933.20x = 151,472.70 × 56,512.80
  4. Step 4: Simplify right side
    100,933.20x = 8,560,146,400.56
  5. Step 5: Solve for x
    x = 8,560,146,400.56/100,933.20
  6. Step 6: Final answer
    x = 84,810.02

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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.