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Finding the Fourth Proportional to 123,578.90, 170,544.56 and 69,866.18

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Solution

The fourth proportional to 123,578.90, 170,544.56 and 69,866.18 is: 96,418.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,578.90 : 170,544.56 = 69,866.18 : x
  2. Step 2: Convert to fraction form
    123,578.90/170,544.56 = 69,866.18/x
  3. Step 3: Cross multiply
    123,578.90x = 170,544.56 × 69,866.18
  4. Step 4: Simplify right side
    123,578.90x = 11,915,296,926.98
  5. Step 5: Solve for x
    x = 11,915,296,926.98/123,578.90
  6. Step 6: Final answer
    x = 96,418.54

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1.5x scale

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.