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Finding the Fourth Proportional to 71,620.95, 98,836.89 and 39,357.65

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Solution

The fourth proportional to 71,620.95, 98,836.89 and 39,357.65 is: 54,313.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,620.95 : 98,836.89 = 39,357.65 : x
  2. Step 2: Convert to fraction form
    71,620.95/98,836.89 = 39,357.65/x
  3. Step 3: Cross multiply
    71,620.95x = 98,836.89 × 39,357.65
  4. Step 4: Simplify right side
    71,620.95x = 3,889,987,766.62
  5. Step 5: Solve for x
    x = 3,889,987,766.62/71,620.95
  6. Step 6: Final answer
    x = 54,313.55

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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.