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Finding the Fourth Proportional to 71,321.01, 98,424.54 and 39,057

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Solution

The fourth proportional to 71,321.01, 98,424.54 and 39,057 is: 53,899.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,321.01 : 98,424.54 = 39,057 : x
  2. Step 2: Convert to fraction form
    71,321.01/98,424.54 = 39,057/x
  3. Step 3: Cross multiply
    71,321.01x = 98,424.54 × 39,057
  4. Step 4: Simplify right side
    71,321.01x = 3,844,167,258.78
  5. Step 5: Solve for x
    x = 3,844,167,258.78/71,321.01
  6. Step 6: Final answer
    x = 53,899.51

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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.