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Finding the Fourth Proportional to 153.61, 230.41 and 57.42

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Solution

The fourth proportional to 153.61, 230.41 and 57.42 is: 86.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    153.61 : 230.41 = 57.42 : x
  2. Step 2: Convert to fraction form
    153.61/230.41 = 57.42/x
  3. Step 3: Cross multiply
    153.61x = 230.41 × 57.42
  4. Step 4: Simplify right side
    153.61x = 13,230.14
  5. Step 5: Solve for x
    x = 13,230.14/153.61
  6. Step 6: Final answer
    x = 86.13

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.