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Finding the Fourth Proportional to 140.65, 211.05 and 59.56

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Solution

The fourth proportional to 140.65, 211.05 and 59.56 is: 89.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    140.65 : 211.05 = 59.56 : x
  2. Step 2: Convert to fraction form
    140.65/211.05 = 59.56/x
  3. Step 3: Cross multiply
    140.65x = 211.05 × 59.56
  4. Step 4: Simplify right side
    140.65x = 12,570.14
  5. Step 5: Solve for x
    x = 12,570.14/140.65
  6. Step 6: Final answer
    x = 89.37

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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.