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Finding the Fourth Proportional to 71,567.75, 98,760.21 and 39,738.68

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Solution

The fourth proportional to 71,567.75, 98,760.21 and 39,738.68 is: 54,837.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,567.75 : 98,760.21 = 39,738.68 : x
  2. Step 2: Convert to fraction form
    71,567.75/98,760.21 = 39,738.68/x
  3. Step 3: Cross multiply
    71,567.75x = 98,760.21 × 39,738.68
  4. Step 4: Simplify right side
    71,567.75x = 3,924,600,381.92
  5. Step 5: Solve for x
    x = 3,924,600,381.92/71,567.75
  6. Step 6: Final answer
    x = 54,837.55

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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.