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Finding the Fourth Proportional to 70,145.76, 96,799.74 and 39,930.44

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Solution

The fourth proportional to 70,145.76, 96,799.74 and 39,930.44 is: 55,103.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,145.76 : 96,799.74 = 39,930.44 : x
  2. Step 2: Convert to fraction form
    70,145.76/96,799.74 = 39,930.44/x
  3. Step 3: Cross multiply
    70,145.76x = 96,799.74 × 39,930.44
  4. Step 4: Simplify right side
    70,145.76x = 3,865,255,726.09
  5. Step 5: Solve for x
    x = 3,865,255,726.09/70,145.76
  6. Step 6: Final answer
    x = 55,103.20

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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.