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Finding the Fourth Proportional to 71,778.13, 99,052.84 and 39,947.03

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Solution

The fourth proportional to 71,778.13, 99,052.84 and 39,947.03 is: 55,126.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,778.13 : 99,052.84 = 39,947.03 : x
  2. Step 2: Convert to fraction form
    71,778.13/99,052.84 = 39,947.03/x
  3. Step 3: Cross multiply
    71,778.13x = 99,052.84 × 39,947.03
  4. Step 4: Simplify right side
    71,778.13x = 3,956,866,771.07
  5. Step 5: Solve for x
    x = 3,956,866,771.07/71,778.13
  6. Step 6: Final answer
    x = 55,126.36

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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.