Home / 87,930.72-121,290.48-71,821.44

Finding the Fourth Proportional to 87,930.72, 121,290.48 and 71,821.44

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Solution

The fourth proportional to 87,930.72, 121,290.48 and 71,821.44 is: 99,069.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,930.72 : 121,290.48 = 71,821.44 : x
  2. Step 2: Convert to fraction form
    87,930.72/121,290.48 = 71,821.44/x
  3. Step 3: Cross multiply
    87,930.72x = 121,290.48 × 71,821.44
  4. Step 4: Simplify right side
    87,930.72x = 8,711,256,931.89
  5. Step 5: Solve for x
    x = 8,711,256,931.89/87,930.72
  6. Step 6: Final answer
    x = 99,069.55

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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.