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Finding the Fourth Proportional to 165,472.80, 248,266.80 and 72,007.20

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Solution

The fourth proportional to 165,472.80, 248,266.80 and 72,007.20 is: 108,035.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    165,472.80 : 248,266.80 = 72,007.20 : x
  2. Step 2: Convert to fraction form
    165,472.80/248,266.80 = 72,007.20/x
  3. Step 3: Cross multiply
    165,472.80x = 248,266.80 × 72,007.20
  4. Step 4: Simplify right side
    165,472.80x = 17,876,997,120.96
  5. Step 5: Solve for x
    x = 17,876,997,120.96/165,472.80
  6. Step 6: Final answer
    x = 108,035.87

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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.