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Finding the Fourth Proportional to 248,011.20, 372,016.80 and 79,531.20

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Solution

The fourth proportional to 248,011.20, 372,016.80 and 79,531.20 is: 119,296.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    248,011.20 : 372,016.80 = 79,531.20 : x
  2. Step 2: Convert to fraction form
    248,011.20/372,016.80 = 79,531.20/x
  3. Step 3: Cross multiply
    248,011.20x = 372,016.80 × 79,531.20
  4. Step 4: Simplify right side
    248,011.20x = 29,586,942,524.16
  5. Step 5: Solve for x
    x = 29,586,942,524.16/248,011.20
  6. Step 6: Final answer
    x = 119,296.80

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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.