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Finding the Fourth Proportional to 152.82, 210.68 and 130.64

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Solution

The fourth proportional to 152.82, 210.68 and 130.64 is: 180.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    152.82 : 210.68 = 130.64 : x
  2. Step 2: Convert to fraction form
    152.82/210.68 = 130.64/x
  3. Step 3: Cross multiply
    152.82x = 210.68 × 130.64
  4. Step 4: Simplify right side
    152.82x = 27,523.24
  5. Step 5: Solve for x
    x = 27,523.24/152.82
  6. Step 6: Final answer
    x = 180.10

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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.