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Finding the Fourth Proportional to 101,269.80, 139,755.78 and 63,564.84

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Solution

The fourth proportional to 101,269.80, 139,755.78 and 63,564.84 is: 87,721.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,269.80 : 139,755.78 = 63,564.84 : x
  2. Step 2: Convert to fraction form
    101,269.80/139,755.78 = 63,564.84/x
  3. Step 3: Cross multiply
    101,269.80x = 139,755.78 × 63,564.84
  4. Step 4: Simplify right side
    101,269.80x = 8,883,553,794.78
  5. Step 5: Solve for x
    x = 8,883,553,794.78/101,269.80
  6. Step 6: Final answer
    x = 87,721.65

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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.