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Finding the Fourth Proportional to 70,139.67, 96,793.26 and 38,308.57

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Solution

The fourth proportional to 70,139.67, 96,793.26 and 38,308.57 is: 52,866.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,139.67 : 96,793.26 = 38,308.57 : x
  2. Step 2: Convert to fraction form
    70,139.67/96,793.26 = 38,308.57/x
  3. Step 3: Cross multiply
    70,139.67x = 96,793.26 × 38,308.57
  4. Step 4: Simplify right side
    70,139.67x = 3,708,011,397.51
  5. Step 5: Solve for x
    x = 3,708,011,397.51/70,139.67
  6. Step 6: Final answer
    x = 52,866.11

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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.