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Finding the Fourth Proportional to 97.86, 145.77 and 93.18

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Solution

The fourth proportional to 97.86, 145.77 and 93.18 is: 138.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    97.86 : 145.77 = 93.18 : x
  2. Step 2: Convert to fraction form
    97.86/145.77 = 93.18/x
  3. Step 3: Cross multiply
    97.86x = 145.77 × 93.18
  4. Step 4: Simplify right side
    97.86x = 13,582.85
  5. Step 5: Solve for x
    x = 13,582.85/97.86
  6. Step 6: Final answer
    x = 138.80

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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.