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Finding the Fourth Proportional to 140.39, 210.51 and 49.07

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Solution

The fourth proportional to 140.39, 210.51 and 49.07 is: 73.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    140.39 : 210.51 = 49.07 : x
  2. Step 2: Convert to fraction form
    140.39/210.51 = 49.07/x
  3. Step 3: Cross multiply
    140.39x = 210.51 × 49.07
  4. Step 4: Simplify right side
    140.39x = 10,329.73
  5. Step 5: Solve for x
    x = 10,329.73/140.39
  6. Step 6: Final answer
    x = 73.58

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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.