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Finding the Fourth Proportional to 195.61, 293.45 and 87.40

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Solution

The fourth proportional to 195.61, 293.45 and 87.40 is: 131.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    195.61 : 293.45 = 87.40 : x
  2. Step 2: Convert to fraction form
    195.61/293.45 = 87.40/x
  3. Step 3: Cross multiply
    195.61x = 293.45 × 87.40
  4. Step 4: Simplify right side
    195.61x = 25,646.43
  5. Step 5: Solve for x
    x = 25,646.43/195.61
  6. Step 6: Final answer
    x = 131.11

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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.