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Finding the Fourth Proportional to 144, 215.60 and 123.35

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Solution

The fourth proportional to 144, 215.60 and 123.35 is: 184.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    144 : 215.60 = 123.35 : x
  2. Step 2: Convert to fraction form
    144/215.60 = 123.35/x
  3. Step 3: Cross multiply
    144x = 215.60 × 123.35
  4. Step 4: Simplify right side
    144x = 26,592.57
  5. Step 5: Solve for x
    x = 26,592.57/144
  6. Step 6: Final answer
    x = 184.67

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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.