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Finding the Fourth Proportional to 153.60, 229.15 and 126.47

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Solution

The fourth proportional to 153.60, 229.15 and 126.47 is: 188.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    153.60 : 229.15 = 126.47 : x
  2. Step 2: Convert to fraction form
    153.60/229.15 = 126.47/x
  3. Step 3: Cross multiply
    153.60x = 229.15 × 126.47
  4. Step 4: Simplify right side
    153.60x = 28,979.14
  5. Step 5: Solve for x
    x = 28,979.14/153.60
  6. Step 6: Final answer
    x = 188.67

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.