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Finding the Fourth Proportional to 157.18, 234.36 and 141.45

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Solution

The fourth proportional to 157.18, 234.36 and 141.45 is: 210.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    157.18 : 234.36 = 141.45 : x
  2. Step 2: Convert to fraction form
    157.18/234.36 = 141.45/x
  3. Step 3: Cross multiply
    157.18x = 234.36 × 141.45
  4. Step 4: Simplify right side
    157.18x = 33,148.34
  5. Step 5: Solve for x
    x = 33,148.34/157.18
  6. Step 6: Final answer
    x = 210.90

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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.