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Finding the Fourth Proportional to 192,456.56, 288,743.16 and 87,247.28

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Solution

The fourth proportional to 192,456.56, 288,743.16 and 87,247.28 is: 130,897.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    192,456.56 : 288,743.16 = 87,247.28 : x
  2. Step 2: Convert to fraction form
    192,456.56/288,743.16 = 87,247.28/x
  3. Step 3: Cross multiply
    192,456.56x = 288,743.16 × 87,247.28
  4. Step 4: Simplify right side
    192,456.56x = 25,192,055,328.60
  5. Step 5: Solve for x
    x = 25,192,055,328.60/192,456.56
  6. Step 6: Final answer
    x = 130,897.36

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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.