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Finding the Fourth Proportional to 152.08, 209.84 and 103.02

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Solution

The fourth proportional to 152.08, 209.84 and 103.02 is: 142.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    152.08 : 209.84 = 103.02 : x
  2. Step 2: Convert to fraction form
    152.08/209.84 = 103.02/x
  3. Step 3: Cross multiply
    152.08x = 209.84 × 103.02
  4. Step 4: Simplify right side
    152.08x = 21,617.72
  5. Step 5: Solve for x
    x = 21,617.72/152.08
  6. Step 6: Final answer
    x = 142.15

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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.