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Finding the Fourth Proportional to 71,695.80, 98,941.34 and 39,431.82

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Solution

The fourth proportional to 71,695.80, 98,941.34 and 39,431.82 is: 54,416.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,695.80 : 98,941.34 = 39,431.82 : x
  2. Step 2: Convert to fraction form
    71,695.80/98,941.34 = 39,431.82/x
  3. Step 3: Cross multiply
    71,695.80x = 98,941.34 × 39,431.82
  4. Step 4: Simplify right side
    71,695.80x = 3,901,436,912.28
  5. Step 5: Solve for x
    x = 3,901,436,912.28/71,695.80
  6. Step 6: Final answer
    x = 54,416.53

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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.