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Finding the Fourth Proportional to 176.18, 243.16 and 98.58

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Solution

The fourth proportional to 176.18, 243.16 and 98.58 is: 136.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    176.18 : 243.16 = 98.58 : x
  2. Step 2: Convert to fraction form
    176.18/243.16 = 98.58/x
  3. Step 3: Cross multiply
    176.18x = 243.16 × 98.58
  4. Step 4: Simplify right side
    176.18x = 23,970.71
  5. Step 5: Solve for x
    x = 23,970.71/176.18
  6. Step 6: Final answer
    x = 136.06

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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.