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Finding the Fourth Proportional to 71,703.68, 98,947.01 and 39,871.89

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Solution

The fourth proportional to 71,703.68, 98,947.01 and 39,871.89 is: 55,020.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,703.68 : 98,947.01 = 39,871.89 : x
  2. Step 2: Convert to fraction form
    71,703.68/98,947.01 = 39,871.89/x
  3. Step 3: Cross multiply
    71,703.68x = 98,947.01 × 39,871.89
  4. Step 4: Simplify right side
    71,703.68x = 3,945,204,099.19
  5. Step 5: Solve for x
    x = 3,945,204,099.19/71,703.68
  6. Step 6: Final answer
    x = 55,020.95

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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.