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Finding the Fourth Proportional to 152.01, 209.60 and 115.10

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Solution

The fourth proportional to 152.01, 209.60 and 115.10 is: 158.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    152.01 : 209.60 = 115.10 : x
  2. Step 2: Convert to fraction form
    152.01/209.60 = 115.10/x
  3. Step 3: Cross multiply
    152.01x = 209.60 × 115.10
  4. Step 4: Simplify right side
    152.01x = 24,123.34
  5. Step 5: Solve for x
    x = 24,123.34/152.01
  6. Step 6: Final answer
    x = 158.70

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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.