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Finding the Fourth Proportional to 123,538.87, 170,483.79 and 66,950.25

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Solution

The fourth proportional to 123,538.87, 170,483.79 and 66,950.25 is: 92,391.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,538.87 : 170,483.79 = 66,950.25 : x
  2. Step 2: Convert to fraction form
    123,538.87/170,483.79 = 66,950.25/x
  3. Step 3: Cross multiply
    123,538.87x = 170,483.79 × 66,950.25
  4. Step 4: Simplify right side
    123,538.87x = 11,413,932,361.45
  5. Step 5: Solve for x
    x = 11,413,932,361.45/123,538.87
  6. Step 6: Final answer
    x = 92,391.43

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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.