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Finding the Fourth Proportional to 130.40, 180.04 and 116.54

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Solution

The fourth proportional to 130.40, 180.04 and 116.54 is: 160.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    130.40 : 180.04 = 116.54 : x
  2. Step 2: Convert to fraction form
    130.40/180.04 = 116.54/x
  3. Step 3: Cross multiply
    130.40x = 180.04 × 116.54
  4. Step 4: Simplify right side
    130.40x = 20,981.86
  5. Step 5: Solve for x
    x = 20,981.86/130.40
  6. Step 6: Final answer
    x = 160.90

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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.