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Finding the Fourth Proportional to 130.80, 180.52 and 75.54

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Solution

The fourth proportional to 130.80, 180.52 and 75.54 is: 104.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    130.80 : 180.52 = 75.54 : x
  2. Step 2: Convert to fraction form
    130.80/180.52 = 75.54/x
  3. Step 3: Cross multiply
    130.80x = 180.52 × 75.54
  4. Step 4: Simplify right side
    130.80x = 13,636.48
  5. Step 5: Solve for x
    x = 13,636.48/130.80
  6. Step 6: Final answer
    x = 104.25

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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.