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Finding the Fourth Proportional to 123,236.46, 170,065.71 and 66,647.70

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Solution

The fourth proportional to 123,236.46, 170,065.71 and 66,647.70 is: 91,973.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,236.46 : 170,065.71 = 66,647.70 : x
  2. Step 2: Convert to fraction form
    123,236.46/170,065.71 = 66,647.70/x
  3. Step 3: Cross multiply
    123,236.46x = 170,065.71 × 66,647.70
  4. Step 4: Simplify right side
    123,236.46x = 11,334,488,420.37
  5. Step 5: Solve for x
    x = 11,334,488,420.37/123,236.46
  6. Step 6: Final answer
    x = 91,973.50

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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.