Home / 71,734.10-98,990.79-39,902.72

Finding the Fourth Proportional to 71,734.10, 98,990.79 and 39,902.72

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Solution

The fourth proportional to 71,734.10, 98,990.79 and 39,902.72 is: 55,064.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,734.10 : 98,990.79 = 39,902.72 : x
  2. Step 2: Convert to fraction form
    71,734.10/98,990.79 = 39,902.72/x
  3. Step 3: Cross multiply
    71,734.10x = 98,990.79 × 39,902.72
  4. Step 4: Simplify right side
    71,734.10x = 3,950,001,775.95
  5. Step 5: Solve for x
    x = 3,950,001,775.95/71,734.10
  6. Step 6: Final answer
    x = 55,064.49

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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.