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Finding the Fourth Proportional to 157.55, 235.71 and 103.48

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Solution

The fourth proportional to 157.55, 235.71 and 103.48 is: 154.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    157.55 : 235.71 = 103.48 : x
  2. Step 2: Convert to fraction form
    157.55/235.71 = 103.48/x
  3. Step 3: Cross multiply
    157.55x = 235.71 × 103.48
  4. Step 4: Simplify right side
    157.55x = 24,390.68
  5. Step 5: Solve for x
    x = 24,390.68/157.55
  6. Step 6: Final answer
    x = 154.82

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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.