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Finding the Fourth Proportional to 230.15, 317.62 and 136.95

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Solution

The fourth proportional to 230.15, 317.62 and 136.95 is: 189.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    230.15 : 317.62 = 136.95 : x
  2. Step 2: Convert to fraction form
    230.15/317.62 = 136.95/x
  3. Step 3: Cross multiply
    230.15x = 317.62 × 136.95
  4. Step 4: Simplify right side
    230.15x = 43,498.06
  5. Step 5: Solve for x
    x = 43,498.06/230.15
  6. Step 6: Final answer
    x = 189.00

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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.