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Finding the Fourth Proportional to 130.10, 179.07 and 91.22

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Solution

The fourth proportional to 130.10, 179.07 and 91.22 is: 125.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    130.10 : 179.07 = 91.22 : x
  2. Step 2: Convert to fraction form
    130.10/179.07 = 91.22/x
  3. Step 3: Cross multiply
    130.10x = 179.07 × 91.22
  4. Step 4: Simplify right side
    130.10x = 16,334.77
  5. Step 5: Solve for x
    x = 16,334.77/130.10
  6. Step 6: Final answer
    x = 125.56

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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.