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Finding the Fourth Proportional to 123,391.76, 170,281.34 and 66,803.13

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Solution

The fourth proportional to 123,391.76, 170,281.34 and 66,803.13 is: 92,188.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,391.76 : 170,281.34 = 66,803.13 : x
  2. Step 2: Convert to fraction form
    123,391.76/170,281.34 = 66,803.13/x
  3. Step 3: Cross multiply
    123,391.76x = 170,281.34 × 66,803.13
  4. Step 4: Simplify right side
    123,391.76x = 11,375,326,409.09
  5. Step 5: Solve for x
    x = 11,375,326,409.09/123,391.76
  6. Step 6: Final answer
    x = 92,188.71

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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.