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Finding the Fourth Proportional to 71,493.51, 98,672.87 and 39,672.66

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Solution

The fourth proportional to 71,493.51, 98,672.87 and 39,672.66 is: 54,754.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,493.51 : 98,672.87 = 39,672.66 : x
  2. Step 2: Convert to fraction form
    71,493.51/98,672.87 = 39,672.66/x
  3. Step 3: Cross multiply
    71,493.51x = 98,672.87 × 39,672.66
  4. Step 4: Simplify right side
    71,493.51x = 3,914,615,222.73
  5. Step 5: Solve for x
    x = 3,914,615,222.73/71,493.51
  6. Step 6: Final answer
    x = 54,754.83

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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.