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Finding the Fourth Proportional to 193.48, 267.06 and 128.16

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Solution

The fourth proportional to 193.48, 267.06 and 128.16 is: 176.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    193.48 : 267.06 = 128.16 : x
  2. Step 2: Convert to fraction form
    193.48/267.06 = 128.16/x
  3. Step 3: Cross multiply
    193.48x = 267.06 × 128.16
  4. Step 4: Simplify right side
    193.48x = 34,226.41
  5. Step 5: Solve for x
    x = 34,226.41/193.48
  6. Step 6: Final answer
    x = 176.90

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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.