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Finding the Fourth Proportional to 87,348.80, 130,828.80 and 71,796.80

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Solution

The fourth proportional to 87,348.80, 130,828.80 and 71,796.80 is: 107,535.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,348.80 : 130,828.80 = 71,796.80 : x
  2. Step 2: Convert to fraction form
    87,348.80/130,828.80 = 71,796.80/x
  3. Step 3: Cross multiply
    87,348.80x = 130,828.80 × 71,796.80
  4. Step 4: Simplify right side
    87,348.80x = 9,393,089,187.84
  5. Step 5: Solve for x
    x = 9,393,089,187.84/87,348.80
  6. Step 6: Final answer
    x = 107,535.41

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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.