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Finding the Fourth Proportional to 130.02, 179.47 and 80.91

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Solution

The fourth proportional to 130.02, 179.47 and 80.91 is: 111.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    130.02 : 179.47 = 80.91 : x
  2. Step 2: Convert to fraction form
    130.02/179.47 = 80.91/x
  3. Step 3: Cross multiply
    130.02x = 179.47 × 80.91
  4. Step 4: Simplify right side
    130.02x = 14,521.02
  5. Step 5: Solve for x
    x = 14,521.02/130.02
  6. Step 6: Final answer
    x = 111.69

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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.