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Finding the Fourth Proportional to 152.09, 210 and 115.19

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Solution

The fourth proportional to 152.09, 210 and 115.19 is: 159.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    152.09 : 210 = 115.19 : x
  2. Step 2: Convert to fraction form
    152.09/210 = 115.19/x
  3. Step 3: Cross multiply
    152.09x = 210 × 115.19
  4. Step 4: Simplify right side
    152.09x = 24,188.85
  5. Step 5: Solve for x
    x = 24,188.85/152.09
  6. Step 6: Final answer
    x = 159.05

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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.