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Finding the Fourth Proportional to 70,139.70, 96,792.79 and 38,308.68

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Solution

The fourth proportional to 70,139.70, 96,792.79 and 38,308.68 is: 52,865.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,139.70 : 96,792.79 = 38,308.68 : x
  2. Step 2: Convert to fraction form
    70,139.70/96,792.79 = 38,308.68/x
  3. Step 3: Cross multiply
    70,139.70x = 96,792.79 × 38,308.68
  4. Step 4: Simplify right side
    70,139.70x = 3,708,003,776.44
  5. Step 5: Solve for x
    x = 3,708,003,776.44/70,139.70
  6. Step 6: Final answer
    x = 52,865.98

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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.