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Finding the Fourth Proportional to 70,922.80, 97,869 and 39,091.87

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Solution

The fourth proportional to 70,922.80, 97,869 and 39,091.87 is: 53,944.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,922.80 : 97,869 = 39,091.87 : x
  2. Step 2: Convert to fraction form
    70,922.80/97,869 = 39,091.87/x
  3. Step 3: Cross multiply
    70,922.80x = 97,869 × 39,091.87
  4. Step 4: Simplify right side
    70,922.80x = 3,825,882,225.03
  5. Step 5: Solve for x
    x = 3,825,882,225.03/70,922.80
  6. Step 6: Final answer
    x = 53,944.32

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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.