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Finding the Fourth Proportional to 152.85, 229.40 and 61.55

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Solution

The fourth proportional to 152.85, 229.40 and 61.55 is: 92.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    152.85 : 229.40 = 61.55 : x
  2. Step 2: Convert to fraction form
    152.85/229.40 = 61.55/x
  3. Step 3: Cross multiply
    152.85x = 229.40 × 61.55
  4. Step 4: Simplify right side
    152.85x = 14,119.89
  5. Step 5: Solve for x
    x = 14,119.89/152.85
  6. Step 6: Final answer
    x = 92.37

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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.