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Finding the Fourth Proportional to 138,169.80, 207,473.40 and 104,927.40

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Solution

The fourth proportional to 138,169.80, 207,473.40 and 104,927.40 is: 157,557.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,169.80 : 207,473.40 = 104,927.40 : x
  2. Step 2: Convert to fraction form
    138,169.80/207,473.40 = 104,927.40/x
  3. Step 3: Cross multiply
    138,169.80x = 207,473.40 × 104,927.40
  4. Step 4: Simplify right side
    138,169.80x = 21,769,644,431.16
  5. Step 5: Solve for x
    x = 21,769,644,431.16/138,169.80
  6. Step 6: Final answer
    x = 157,557.18

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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.