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Finding the Fourth Proportional to 97.50, 145.32 and 92.86

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Solution

The fourth proportional to 97.50, 145.32 and 92.86 is: 138.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    97.50 : 145.32 = 92.86 : x
  2. Step 2: Convert to fraction form
    97.50/145.32 = 92.86/x
  3. Step 3: Cross multiply
    97.50x = 145.32 × 92.86
  4. Step 4: Simplify right side
    97.50x = 13,494.42
  5. Step 5: Solve for x
    x = 13,494.42/97.50
  6. Step 6: Final answer
    x = 138.40

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.