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Finding the Fourth Proportional to 70,137.70, 96,789.30 and 38,306.60

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Solution

The fourth proportional to 70,137.70, 96,789.30 and 38,306.60 is: 52,862.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,137.70 : 96,789.30 = 38,306.60 : x
  2. Step 2: Convert to fraction form
    70,137.70/96,789.30 = 38,306.60/x
  3. Step 3: Cross multiply
    70,137.70x = 96,789.30 × 38,306.60
  4. Step 4: Simplify right side
    70,137.70x = 3,707,668,999.38
  5. Step 5: Solve for x
    x = 3,707,668,999.38/70,137.70
  6. Step 6: Final answer
    x = 52,862.71

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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.