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Finding the Fourth Proportional to 141, 211.50 and 55.50

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Solution

The fourth proportional to 141, 211.50 and 55.50 is: 83.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    141 : 211.50 = 55.50 : x
  2. Step 2: Convert to fraction form
    141/211.50 = 55.50/x
  3. Step 3: Cross multiply
    141x = 211.50 × 55.50
  4. Step 4: Simplify right side
    141x = 11,738.25
  5. Step 5: Solve for x
    x = 11,738.25/141
  6. Step 6: Final answer
    x = 83.25

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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.