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Finding the Fourth Proportional to 130.47, 179.84 and 99.29

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Solution

The fourth proportional to 130.47, 179.84 and 99.29 is: 136.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    130.47 : 179.84 = 99.29 : x
  2. Step 2: Convert to fraction form
    130.47/179.84 = 99.29/x
  3. Step 3: Cross multiply
    130.47x = 179.84 × 99.29
  4. Step 4: Simplify right side
    130.47x = 17,855.66
  5. Step 5: Solve for x
    x = 17,855.66/130.47
  6. Step 6: Final answer
    x = 136.86

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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.