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Finding the Fourth Proportional to 71,242.50, 98,311.68 and 39,409.38

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Solution

The fourth proportional to 71,242.50, 98,311.68 and 39,409.38 is: 54,383.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,242.50 : 98,311.68 = 39,409.38 : x
  2. Step 2: Convert to fraction form
    71,242.50/98,311.68 = 39,409.38/x
  3. Step 3: Cross multiply
    71,242.50x = 98,311.68 × 39,409.38
  4. Step 4: Simplify right side
    71,242.50x = 3,874,402,355.56
  5. Step 5: Solve for x
    x = 3,874,402,355.56/71,242.50
  6. Step 6: Final answer
    x = 54,383.30

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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.