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Finding the Fourth Proportional to 71,477.49, 98,640.25 and 39,213.76

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Solution

The fourth proportional to 71,477.49, 98,640.25 and 39,213.76 is: 54,115.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,477.49 : 98,640.25 = 39,213.76 : x
  2. Step 2: Convert to fraction form
    71,477.49/98,640.25 = 39,213.76/x
  3. Step 3: Cross multiply
    71,477.49x = 98,640.25 × 39,213.76
  4. Step 4: Simplify right side
    71,477.49x = 3,868,055,089.84
  5. Step 5: Solve for x
    x = 3,868,055,089.84/71,477.49
  6. Step 6: Final answer
    x = 54,115.71

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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.