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Finding the Fourth Proportional to 71,718.50, 98,973.43 and 39,453.98

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Solution

The fourth proportional to 71,718.50, 98,973.43 and 39,453.98 is: 54,447.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,718.50 : 98,973.43 = 39,453.98 : x
  2. Step 2: Convert to fraction form
    71,718.50/98,973.43 = 39,453.98/x
  3. Step 3: Cross multiply
    71,718.50x = 98,973.43 × 39,453.98
  4. Step 4: Simplify right side
    71,718.50x = 3,904,895,134.25
  5. Step 5: Solve for x
    x = 3,904,895,134.25/71,718.50
  6. Step 6: Final answer
    x = 54,447.53

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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.