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Finding the Fourth Proportional to 70,135.61, 96,789.33 and 39,920.18

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Solution

The fourth proportional to 70,135.61, 96,789.33 and 39,920.18 is: 55,091.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,135.61 : 96,789.33 = 39,920.18 : x
  2. Step 2: Convert to fraction form
    70,135.61/96,789.33 = 39,920.18/x
  3. Step 3: Cross multiply
    70,135.61x = 96,789.33 × 39,920.18
  4. Step 4: Simplify right side
    70,135.61x = 3,863,846,991.73
  5. Step 5: Solve for x
    x = 3,863,846,991.73/70,135.61
  6. Step 6: Final answer
    x = 55,091.09

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1.5x scale

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.