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Finding the Fourth Proportional to 176.40, 242.10 and 157.86

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Solution

The fourth proportional to 176.40, 242.10 and 157.86 is: 216.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    176.40 : 242.10 = 157.86 : x
  2. Step 2: Convert to fraction form
    176.40/242.10 = 157.86/x
  3. Step 3: Cross multiply
    176.40x = 242.10 × 157.86
  4. Step 4: Simplify right side
    176.40x = 38,217.91
  5. Step 5: Solve for x
    x = 38,217.91/176.40
  6. Step 6: Final answer
    x = 216.65

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.