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Finding the Fourth Proportional to 123,336.65, 170,205.09 and 66,748.02

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Solution

The fourth proportional to 123,336.65, 170,205.09 and 66,748.02 is: 92,112.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,336.65 : 170,205.09 = 66,748.02 : x
  2. Step 2: Convert to fraction form
    123,336.65/170,205.09 = 66,748.02/x
  3. Step 3: Cross multiply
    123,336.65x = 170,205.09 × 66,748.02
  4. Step 4: Simplify right side
    123,336.65x = 11,360,852,751.42
  5. Step 5: Solve for x
    x = 11,360,852,751.42/123,336.65
  6. Step 6: Final answer
    x = 92,112.55

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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.