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Finding the Fourth Proportional to 130.54, 180.17 and 99.41

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Solution

The fourth proportional to 130.54, 180.17 and 99.41 is: 137.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    130.54 : 180.17 = 99.41 : x
  2. Step 2: Convert to fraction form
    130.54/180.17 = 99.41/x
  3. Step 3: Cross multiply
    130.54x = 180.17 × 99.41
  4. Step 4: Simplify right side
    130.54x = 17,909.30
  5. Step 5: Solve for x
    x = 17,909.30/130.54
  6. Step 6: Final answer
    x = 137.20

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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.