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Finding the Fourth Proportional to 72,755.65, 108,490.96 and 63,907.21

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Solution

The fourth proportional to 72,755.65, 108,490.96 and 63,907.21 is: 95,296.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,755.65 : 108,490.96 = 63,907.21 : x
  2. Step 2: Convert to fraction form
    72,755.65/108,490.96 = 63,907.21/x
  3. Step 3: Cross multiply
    72,755.65x = 108,490.96 × 63,907.21
  4. Step 4: Simplify right side
    72,755.65x = 6,933,354,563.82
  5. Step 5: Solve for x
    x = 6,933,354,563.82/72,755.65
  6. Step 6: Final answer
    x = 95,296.44

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.