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Finding the Fourth Proportional to 140.63, 193.64 and 112.86

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Solution

The fourth proportional to 140.63, 193.64 and 112.86 is: 155.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    140.63 : 193.64 = 112.86 : x
  2. Step 2: Convert to fraction form
    140.63/193.64 = 112.86/x
  3. Step 3: Cross multiply
    140.63x = 193.64 × 112.86
  4. Step 4: Simplify right side
    140.63x = 21,853.65
  5. Step 5: Solve for x
    x = 21,853.65/140.63
  6. Step 6: Final answer
    x = 155.40

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.