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Finding the Fourth Proportional to 123,516.78, 170,453.74 and 66,928.14

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Solution

The fourth proportional to 123,516.78, 170,453.74 and 66,928.14 is: 92,361.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,516.78 : 170,453.74 = 66,928.14 : x
  2. Step 2: Convert to fraction form
    123,516.78/170,453.74 = 66,928.14/x
  3. Step 3: Cross multiply
    123,516.78x = 170,453.74 × 66,928.14
  4. Step 4: Simplify right side
    123,516.78x = 11,408,151,774.24
  5. Step 5: Solve for x
    x = 11,408,151,774.24/123,516.78
  6. Step 6: Final answer
    x = 92,361.15

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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.