Home / 123,612.12-186,344.66-115,372.88

Finding the Fourth Proportional to 123,612.12, 186,344.66 and 115,372.88

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Solution

The fourth proportional to 123,612.12, 186,344.66 and 115,372.88 is: 173,924.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,612.12 : 186,344.66 = 115,372.88 : x
  2. Step 2: Convert to fraction form
    123,612.12/186,344.66 = 115,372.88/x
  3. Step 3: Cross multiply
    123,612.12x = 186,344.66 × 115,372.88
  4. Step 4: Simplify right side
    123,612.12x = 21,499,120,096.82
  5. Step 5: Solve for x
    x = 21,499,120,096.82/123,612.12
  6. Step 6: Final answer
    x = 173,924.05

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.