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Finding the Fourth Proportional to 131.16, 181.02 and 115.32

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Solution

The fourth proportional to 131.16, 181.02 and 115.32 is: 159.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    131.16 : 181.02 = 115.32 : x
  2. Step 2: Convert to fraction form
    131.16/181.02 = 115.32/x
  3. Step 3: Cross multiply
    131.16x = 181.02 × 115.32
  4. Step 4: Simplify right side
    131.16x = 20,875.23
  5. Step 5: Solve for x
    x = 20,875.23/131.16
  6. Step 6: Final answer
    x = 159.16

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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.