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Finding the Fourth Proportional to 101,611.26, 140,132.16 and 65,763.90

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Solution

The fourth proportional to 101,611.26, 140,132.16 and 65,763.90 is: 90,695.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,611.26 : 140,132.16 = 65,763.90 : x
  2. Step 2: Convert to fraction form
    101,611.26/140,132.16 = 65,763.90/x
  3. Step 3: Cross multiply
    101,611.26x = 140,132.16 × 65,763.90
  4. Step 4: Simplify right side
    101,611.26x = 9,215,637,357.02
  5. Step 5: Solve for x
    x = 9,215,637,357.02/101,611.26
  6. Step 6: Final answer
    x = 90,695.04

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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.