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Finding the Fourth Proportional to 162.40, 223.98 and 112.60

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Solution

The fourth proportional to 162.40, 223.98 and 112.60 is: 155.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    162.40 : 223.98 = 112.60 : x
  2. Step 2: Convert to fraction form
    162.40/223.98 = 112.60/x
  3. Step 3: Cross multiply
    162.40x = 223.98 × 112.60
  4. Step 4: Simplify right side
    162.40x = 25,220.15
  5. Step 5: Solve for x
    x = 25,220.15/162.40
  6. Step 6: Final answer
    x = 155.30

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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.