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Finding the Fourth Proportional to 141.13, 211.71 and 68.98

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Solution

The fourth proportional to 141.13, 211.71 and 68.98 is: 103.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    141.13 : 211.71 = 68.98 : x
  2. Step 2: Convert to fraction form
    141.13/211.71 = 68.98/x
  3. Step 3: Cross multiply
    141.13x = 211.71 × 68.98
  4. Step 4: Simplify right side
    141.13x = 14,603.76
  5. Step 5: Solve for x
    x = 14,603.76/141.13
  6. Step 6: Final answer
    x = 103.48

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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.