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Finding the Fourth Proportional to 71,140.87, 98,173.08 and 39,309.09

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Solution

The fourth proportional to 71,140.87, 98,173.08 and 39,309.09 is: 54,245.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,140.87 : 98,173.08 = 39,309.09 : x
  2. Step 2: Convert to fraction form
    71,140.87/98,173.08 = 39,309.09/x
  3. Step 3: Cross multiply
    71,140.87x = 98,173.08 × 39,309.09
  4. Step 4: Simplify right side
    71,140.87x = 3,859,094,437.30
  5. Step 5: Solve for x
    x = 3,859,094,437.30/71,140.87
  6. Step 6: Final answer
    x = 54,245.81

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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.