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Finding the Fourth Proportional to 152.72, 228.80 and 84.16

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Solution

The fourth proportional to 152.72, 228.80 and 84.16 is: 126.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    152.72 : 228.80 = 84.16 : x
  2. Step 2: Convert to fraction form
    152.72/228.80 = 84.16/x
  3. Step 3: Cross multiply
    152.72x = 228.80 × 84.16
  4. Step 4: Simplify right side
    152.72x = 19,255.81
  5. Step 5: Solve for x
    x = 19,255.81/152.72
  6. Step 6: Final answer
    x = 126.09

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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.