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Finding the Fourth Proportional to 71,361.70, 98,279.40 and 69,811.98

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Solution

The fourth proportional to 71,361.70, 98,279.40 and 69,811.98 is: 96,145.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,361.70 : 98,279.40 = 69,811.98 : x
  2. Step 2: Convert to fraction form
    71,361.70/98,279.40 = 69,811.98/x
  3. Step 3: Cross multiply
    71,361.70x = 98,279.40 × 69,811.98
  4. Step 4: Simplify right side
    71,361.70x = 6,861,079,507.21
  5. Step 5: Solve for x
    x = 6,861,079,507.21/71,361.70
  6. Step 6: Final answer
    x = 96,145.12

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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.