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Finding the Fourth Proportional to 123,765.75, 170,782.53 and 69,310.32

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Solution

The fourth proportional to 123,765.75, 170,782.53 and 69,310.32 is: 95,640.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,765.75 : 170,782.53 = 69,310.32 : x
  2. Step 2: Convert to fraction form
    123,765.75/170,782.53 = 69,310.32/x
  3. Step 3: Cross multiply
    123,765.75x = 170,782.53 × 69,310.32
  4. Step 4: Simplify right side
    123,765.75x = 11,836,991,804.71
  5. Step 5: Solve for x
    x = 11,836,991,804.71/123,765.75
  6. Step 6: Final answer
    x = 95,640.29

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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.