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Finding the Fourth Proportional to 162.80, 224.16 and 125.50

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Solution

The fourth proportional to 162.80, 224.16 and 125.50 is: 172.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    162.80 : 224.16 = 125.50 : x
  2. Step 2: Convert to fraction form
    162.80/224.16 = 125.50/x
  3. Step 3: Cross multiply
    162.80x = 224.16 × 125.50
  4. Step 4: Simplify right side
    162.80x = 28,132.08
  5. Step 5: Solve for x
    x = 28,132.08/162.80
  6. Step 6: Final answer
    x = 172.80

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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.