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Finding the Fourth Proportional to 69,412.60, 104,042.10 and 38,270.20

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Solution

The fourth proportional to 69,412.60, 104,042.10 and 38,270.20 is: 57,362.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,412.60 : 104,042.10 = 38,270.20 : x
  2. Step 2: Convert to fraction form
    69,412.60/104,042.10 = 38,270.20/x
  3. Step 3: Cross multiply
    69,412.60x = 104,042.10 × 38,270.20
  4. Step 4: Simplify right side
    69,412.60x = 3,981,711,975.42
  5. Step 5: Solve for x
    x = 3,981,711,975.42/69,412.60
  6. Step 6: Final answer
    x = 57,362.96

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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.