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Finding the Fourth Proportional to 71,760.74, 99,026.96 and 39,928.95

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Solution

The fourth proportional to 71,760.74, 99,026.96 and 39,928.95 is: 55,100.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,760.74 : 99,026.96 = 39,928.95 : x
  2. Step 2: Convert to fraction form
    71,760.74/99,026.96 = 39,928.95/x
  3. Step 3: Cross multiply
    71,760.74x = 99,026.96 × 39,928.95
  4. Step 4: Simplify right side
    71,760.74x = 3,954,042,334.85
  5. Step 5: Solve for x
    x = 3,954,042,334.85/71,760.74
  6. Step 6: Final answer
    x = 55,100.36

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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.