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Finding the Fourth Proportional to 123,388.15, 170,275.71 and 66,799.54

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Solution

The fourth proportional to 123,388.15, 170,275.71 and 66,799.54 is: 92,183.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,388.15 : 170,275.71 = 66,799.54 : x
  2. Step 2: Convert to fraction form
    123,388.15/170,275.71 = 66,799.54/x
  3. Step 3: Cross multiply
    123,388.15x = 170,275.71 × 66,799.54
  4. Step 4: Simplify right side
    123,388.15x = 11,374,339,101.17
  5. Step 5: Solve for x
    x = 11,374,339,101.17/123,388.15
  6. Step 6: Final answer
    x = 92,183.40

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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.