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Finding the Fourth Proportional to 141.90, 212.58 and 98.59

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Solution

The fourth proportional to 141.90, 212.58 and 98.59 is: 147.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    141.90 : 212.58 = 98.59 : x
  2. Step 2: Convert to fraction form
    141.90/212.58 = 98.59/x
  3. Step 3: Cross multiply
    141.90x = 212.58 × 98.59
  4. Step 4: Simplify right side
    141.90x = 20,958.26
  5. Step 5: Solve for x
    x = 20,958.26/141.90
  6. Step 6: Final answer
    x = 147.70

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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.