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Finding the Fourth Proportional to 123,246.42, 170,080.02 and 66,657.84

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Solution

The fourth proportional to 123,246.42, 170,080.02 and 66,657.84 is: 91,987.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,246.42 : 170,080.02 = 66,657.84 : x
  2. Step 2: Convert to fraction form
    123,246.42/170,080.02 = 66,657.84/x
  3. Step 3: Cross multiply
    123,246.42x = 170,080.02 × 66,657.84
  4. Step 4: Simplify right side
    123,246.42x = 11,337,166,760.36
  5. Step 5: Solve for x
    x = 11,337,166,760.36/123,246.42
  6. Step 6: Final answer
    x = 91,987.80

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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.