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Finding the Fourth Proportional to 162.15, 243.25 and 59.40

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Solution

The fourth proportional to 162.15, 243.25 and 59.40 is: 89.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    162.15 : 243.25 = 59.40 : x
  2. Step 2: Convert to fraction form
    162.15/243.25 = 59.40/x
  3. Step 3: Cross multiply
    162.15x = 243.25 × 59.40
  4. Step 4: Simplify right side
    162.15x = 14,449.05
  5. Step 5: Solve for x
    x = 14,449.05/162.15
  6. Step 6: Final answer
    x = 89.11

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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.