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Finding the Fourth Proportional to 71,502.95, 98,674.08 and 39,671.78

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Solution

The fourth proportional to 71,502.95, 98,674.08 and 39,671.78 is: 54,747.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,502.95 : 98,674.08 = 39,671.78 : x
  2. Step 2: Convert to fraction form
    71,502.95/98,674.08 = 39,671.78/x
  3. Step 3: Cross multiply
    71,502.95x = 98,674.08 × 39,671.78
  4. Step 4: Simplify right side
    71,502.95x = 3,914,575,900.09
  5. Step 5: Solve for x
    x = 3,914,575,900.09/71,502.95
  6. Step 6: Final answer
    x = 54,747.06

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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.