Home / 71,609.82-98,823.42-39,781.68

Finding the Fourth Proportional to 71,609.82, 98,823.42 and 39,781.68

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Solution

The fourth proportional to 71,609.82, 98,823.42 and 39,781.68 is: 54,899.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,609.82 : 98,823.42 = 39,781.68 : x
  2. Step 2: Convert to fraction form
    71,609.82/98,823.42 = 39,781.68/x
  3. Step 3: Cross multiply
    71,609.82x = 98,823.42 × 39,781.68
  4. Step 4: Simplify right side
    71,609.82x = 3,931,361,670.95
  5. Step 5: Solve for x
    x = 3,931,361,670.95/71,609.82
  6. Step 6: Final answer
    x = 54,899.76

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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.