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Finding the Fourth Proportional to 155.71, 214.91 and 93.54

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Solution

The fourth proportional to 155.71, 214.91 and 93.54 is: 129.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    155.71 : 214.91 = 93.54 : x
  2. Step 2: Convert to fraction form
    155.71/214.91 = 93.54/x
  3. Step 3: Cross multiply
    155.71x = 214.91 × 93.54
  4. Step 4: Simplify right side
    155.71x = 20,102.68
  5. Step 5: Solve for x
    x = 20,102.68/155.71
  6. Step 6: Final answer
    x = 129.10

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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.