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Finding the Fourth Proportional to 123,245.32, 170,078.66 and 66,656.70

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Solution

The fourth proportional to 123,245.32, 170,078.66 and 66,656.70 is: 91,986.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,245.32 : 170,078.66 = 66,656.70 : x
  2. Step 2: Convert to fraction form
    123,245.32/170,078.66 = 66,656.70/x
  3. Step 3: Cross multiply
    123,245.32x = 170,078.66 × 66,656.70
  4. Step 4: Simplify right side
    123,245.32x = 11,336,882,216.02
  5. Step 5: Solve for x
    x = 11,336,882,216.02/123,245.32
  6. Step 6: Final answer
    x = 91,986.31

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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.