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Finding the Fourth Proportional to 100,879.40, 151,282.65 and 40,882.70

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Solution

The fourth proportional to 100,879.40, 151,282.65 and 40,882.70 is: 61,309.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,879.40 : 151,282.65 = 40,882.70 : x
  2. Step 2: Convert to fraction form
    100,879.40/151,282.65 = 40,882.70/x
  3. Step 3: Cross multiply
    100,879.40x = 151,282.65 × 40,882.70
  4. Step 4: Simplify right side
    100,879.40x = 6,184,843,195.16
  5. Step 5: Solve for x
    x = 6,184,843,195.16/100,879.40
  6. Step 6: Final answer
    x = 61,309.28

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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.