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Finding the Fourth Proportional to 123,236.54, 170,065.68 and 66,647.78

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Solution

The fourth proportional to 123,236.54, 170,065.68 and 66,647.78 is: 91,973.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,236.54 : 170,065.68 = 66,647.78 : x
  2. Step 2: Convert to fraction form
    123,236.54/170,065.68 = 66,647.78/x
  3. Step 3: Cross multiply
    123,236.54x = 170,065.68 × 66,647.78
  4. Step 4: Simplify right side
    123,236.54x = 11,334,500,026.19
  5. Step 5: Solve for x
    x = 11,334,500,026.19/123,236.54
  6. Step 6: Final answer
    x = 91,973.53

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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.