Home / 71,769.20-99,040.16-39,937.80

Finding the Fourth Proportional to 71,769.20, 99,040.16 and 39,937.80

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Solution

The fourth proportional to 71,769.20, 99,040.16 and 39,937.80 is: 55,113.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,769.20 : 99,040.16 = 39,937.80 : x
  2. Step 2: Convert to fraction form
    71,769.20/99,040.16 = 39,937.80/x
  3. Step 3: Cross multiply
    71,769.20x = 99,040.16 × 39,937.80
  4. Step 4: Simplify right side
    71,769.20x = 3,955,446,102.05
  5. Step 5: Solve for x
    x = 3,955,446,102.05/71,769.20
  6. Step 6: Final answer
    x = 55,113.42

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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.