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Finding the Fourth Proportional to 123,744.31, 170,769.70 and 70,029.31

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Solution

The fourth proportional to 123,744.31, 170,769.70 and 70,029.31 is: 96,641.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,744.31 : 170,769.70 = 70,029.31 : x
  2. Step 2: Convert to fraction form
    123,744.31/170,769.70 = 70,029.31/x
  3. Step 3: Cross multiply
    123,744.31x = 170,769.70 × 70,029.31
  4. Step 4: Simplify right side
    123,744.31x = 11,958,884,240.71
  5. Step 5: Solve for x
    x = 11,958,884,240.71/123,744.31
  6. Step 6: Final answer
    x = 96,641.89

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.