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Finding the Fourth Proportional to 71,778.49, 99,053.33 and 39,947.39

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Solution

The fourth proportional to 71,778.49, 99,053.33 and 39,947.39 is: 55,126.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,778.49 : 99,053.33 = 39,947.39 : x
  2. Step 2: Convert to fraction form
    71,778.49/99,053.33 = 39,947.39/x
  3. Step 3: Cross multiply
    71,778.49x = 99,053.33 × 39,947.39
  4. Step 4: Simplify right side
    71,778.49x = 3,956,922,462.63
  5. Step 5: Solve for x
    x = 3,956,922,462.63/71,778.49
  6. Step 6: Final answer
    x = 55,126.86

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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.