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Finding the Fourth Proportional to 101,843.21, 140,543.42 and 56,521.73

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Solution

The fourth proportional to 101,843.21, 140,543.42 and 56,521.73 is: 77,999.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,843.21 : 140,543.42 = 56,521.73 : x
  2. Step 2: Convert to fraction form
    101,843.21/140,543.42 = 56,521.73/x
  3. Step 3: Cross multiply
    101,843.21x = 140,543.42 × 56,521.73
  4. Step 4: Simplify right side
    101,843.21x = 7,943,756,253.19
  5. Step 5: Solve for x
    x = 7,943,756,253.19/101,843.21
  6. Step 6: Final answer
    x = 77,999.87

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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.