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Finding the Fourth Proportional to 140.61, 212.18 and 134.99

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Solution

The fourth proportional to 140.61, 212.18 and 134.99 is: 203.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    140.61 : 212.18 = 134.99 : x
  2. Step 2: Convert to fraction form
    140.61/212.18 = 134.99/x
  3. Step 3: Cross multiply
    140.61x = 212.18 × 134.99
  4. Step 4: Simplify right side
    140.61x = 28,641.50
  5. Step 5: Solve for x
    x = 28,641.50/140.61
  6. Step 6: Final answer
    x = 203.69

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.