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Finding the Fourth Proportional to 123,568.89, 170,524.91 and 66,980.25

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Solution

The fourth proportional to 123,568.89, 170,524.91 and 66,980.25 is: 92,432.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,568.89 : 170,524.91 = 66,980.25 : x
  2. Step 2: Convert to fraction form
    123,568.89/170,524.91 = 66,980.25/x
  3. Step 3: Cross multiply
    123,568.89x = 170,524.91 × 66,980.25
  4. Step 4: Simplify right side
    123,568.89x = 11,421,800,768.13
  5. Step 5: Solve for x
    x = 11,421,800,768.13/123,568.89
  6. Step 6: Final answer
    x = 92,432.66

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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.