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Finding the Fourth Proportional to 70,139.79, 96,795 and 38,309.22

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Solution

The fourth proportional to 70,139.79, 96,795 and 38,309.22 is: 52,867.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,139.79 : 96,795 = 38,309.22 : x
  2. Step 2: Convert to fraction form
    70,139.79/96,795 = 38,309.22/x
  3. Step 3: Cross multiply
    70,139.79x = 96,795 × 38,309.22
  4. Step 4: Simplify right side
    70,139.79x = 3,708,140,949.90
  5. Step 5: Solve for x
    x = 3,708,140,949.90/70,139.79
  6. Step 6: Final answer
    x = 52,867.87

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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.