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Finding the Fourth Proportional to 141.51, 212.45 and 73.08

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Solution

The fourth proportional to 141.51, 212.45 and 73.08 is: 109.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    141.51 : 212.45 = 73.08 : x
  2. Step 2: Convert to fraction form
    141.51/212.45 = 73.08/x
  3. Step 3: Cross multiply
    141.51x = 212.45 × 73.08
  4. Step 4: Simplify right side
    141.51x = 15,525.85
  5. Step 5: Solve for x
    x = 15,525.85/141.51
  6. Step 6: Final answer
    x = 109.72

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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.