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Finding the Fourth Proportional to 101,780, 140,456.46 and 62,036

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Solution

The fourth proportional to 101,780, 140,456.46 and 62,036 is: 85,609.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,780 : 140,456.46 = 62,036 : x
  2. Step 2: Convert to fraction form
    101,780/140,456.46 = 62,036/x
  3. Step 3: Cross multiply
    101,780x = 140,456.46 × 62,036
  4. Step 4: Simplify right side
    101,780x = 8,713,356,952.56
  5. Step 5: Solve for x
    x = 8,713,356,952.56/101,780
  6. Step 6: Final answer
    x = 85,609.72

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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.