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Finding the Fourth Proportional to 87,470.80, 131,011.80 and 71,918.80

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Solution

The fourth proportional to 87,470.80, 131,011.80 and 71,918.80 is: 107,718.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,470.80 : 131,011.80 = 71,918.80 : x
  2. Step 2: Convert to fraction form
    87,470.80/131,011.80 = 71,918.80/x
  3. Step 3: Cross multiply
    87,470.80x = 131,011.80 × 71,918.80
  4. Step 4: Simplify right side
    87,470.80x = 9,422,211,441.84
  5. Step 5: Solve for x
    x = 9,422,211,441.84/87,470.80
  6. Step 6: Final answer
    x = 107,718.36

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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.