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Finding the Fourth Proportional to 70,211.51, 96,891.39 and 38,380.48

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Solution

The fourth proportional to 70,211.51, 96,891.39 and 38,380.48 is: 52,964.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,211.51 : 96,891.39 = 38,380.48 : x
  2. Step 2: Convert to fraction form
    70,211.51/96,891.39 = 38,380.48/x
  3. Step 3: Cross multiply
    70,211.51x = 96,891.39 × 38,380.48
  4. Step 4: Simplify right side
    70,211.51x = 3,718,738,358.85
  5. Step 5: Solve for x
    x = 3,718,738,358.85/70,211.51
  6. Step 6: Final answer
    x = 52,964.80

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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.