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Finding the Fourth Proportional to 101,021.62, 139,375.98 and 65,235.82

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Solution

The fourth proportional to 101,021.62, 139,375.98 and 65,235.82 is: 90,003.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,021.62 : 139,375.98 = 65,235.82 : x
  2. Step 2: Convert to fraction form
    101,021.62/139,375.98 = 65,235.82/x
  3. Step 3: Cross multiply
    101,021.62x = 139,375.98 × 65,235.82
  4. Step 4: Simplify right side
    101,021.62x = 9,092,306,343.60
  5. Step 5: Solve for x
    x = 9,092,306,343.60/101,021.62
  6. Step 6: Final answer
    x = 90,003.57

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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.