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Finding the Fourth Proportional to 115.32, 158.76 and 93.42

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Solution

The fourth proportional to 115.32, 158.76 and 93.42 is: 128.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    115.32 : 158.76 = 93.42 : x
  2. Step 2: Convert to fraction form
    115.32/158.76 = 93.42/x
  3. Step 3: Cross multiply
    115.32x = 158.76 × 93.42
  4. Step 4: Simplify right side
    115.32x = 14,831.36
  5. Step 5: Solve for x
    x = 14,831.36/115.32
  6. Step 6: Final answer
    x = 128.61

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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.