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Finding the Fourth Proportional to 152.10, 209.76 and 96.74

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Solution

The fourth proportional to 152.10, 209.76 and 96.74 is: 133.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    152.10 : 209.76 = 96.74 : x
  2. Step 2: Convert to fraction form
    152.10/209.76 = 96.74/x
  3. Step 3: Cross multiply
    152.10x = 209.76 × 96.74
  4. Step 4: Simplify right side
    152.10x = 20,292.18
  5. Step 5: Solve for x
    x = 20,292.18/152.10
  6. Step 6: Final answer
    x = 133.41

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.