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Finding the Fourth Proportional to 141.58, 212.02 and 90.07

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Solution

The fourth proportional to 141.58, 212.02 and 90.07 is: 134.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    141.58 : 212.02 = 90.07 : x
  2. Step 2: Convert to fraction form
    141.58/212.02 = 90.07/x
  3. Step 3: Cross multiply
    141.58x = 212.02 × 90.07
  4. Step 4: Simplify right side
    141.58x = 19,096.64
  5. Step 5: Solve for x
    x = 19,096.64/141.58
  6. Step 6: Final answer
    x = 134.88

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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.