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Finding the Fourth Proportional to 130.08, 194.04 and 115.76

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Solution

The fourth proportional to 130.08, 194.04 and 115.76 is: 172.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    130.08 : 194.04 = 115.76 : x
  2. Step 2: Convert to fraction form
    130.08/194.04 = 115.76/x
  3. Step 3: Cross multiply
    130.08x = 194.04 × 115.76
  4. Step 4: Simplify right side
    130.08x = 22,462.07
  5. Step 5: Solve for x
    x = 22,462.07/130.08
  6. Step 6: Final answer
    x = 172.68

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.