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Finding the Fourth Proportional to 101,990.57, 140,756.48 and 61,714.26

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Solution

The fourth proportional to 101,990.57, 140,756.48 and 61,714.26 is: 85,171.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,990.57 : 140,756.48 = 61,714.26 : x
  2. Step 2: Convert to fraction form
    101,990.57/140,756.48 = 61,714.26/x
  3. Step 3: Cross multiply
    101,990.57x = 140,756.48 × 61,714.26
  4. Step 4: Simplify right side
    101,990.57x = 8,686,681,694.83
  5. Step 5: Solve for x
    x = 8,686,681,694.83/101,990.57
  6. Step 6: Final answer
    x = 85,171.42

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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.