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Finding the Fourth Proportional to 153.45, 230.09 and 50.72

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Solution

The fourth proportional to 153.45, 230.09 and 50.72 is: 76.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    153.45 : 230.09 = 50.72 : x
  2. Step 2: Convert to fraction form
    153.45/230.09 = 50.72/x
  3. Step 3: Cross multiply
    153.45x = 230.09 × 50.72
  4. Step 4: Simplify right side
    153.45x = 11,670.87
  5. Step 5: Solve for x
    x = 11,670.87/153.45
  6. Step 6: Final answer
    x = 76.06

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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.