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Finding the Fourth Proportional to 176.13, 264.35 and 84.78

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Solution

The fourth proportional to 176.13, 264.35 and 84.78 is: 127.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    176.13 : 264.35 = 84.78 : x
  2. Step 2: Convert to fraction form
    176.13/264.35 = 84.78/x
  3. Step 3: Cross multiply
    176.13x = 264.35 × 84.78
  4. Step 4: Simplify right side
    176.13x = 22,411.17
  5. Step 5: Solve for x
    x = 22,411.17/176.13
  6. Step 6: Final answer
    x = 127.24

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.