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Finding the Fourth Proportional to 176.08, 265.12 and 128.32

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Solution

The fourth proportional to 176.08, 265.12 and 128.32 is: 193.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    176.08 : 265.12 = 128.32 : x
  2. Step 2: Convert to fraction form
    176.08/265.12 = 128.32/x
  3. Step 3: Cross multiply
    176.08x = 265.12 × 128.32
  4. Step 4: Simplify right side
    176.08x = 34,020.20
  5. Step 5: Solve for x
    x = 34,020.20/176.08
  6. Step 6: Final answer
    x = 193.21

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.