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Finding the Fourth Proportional to 130.01, 179.42 and 90.72

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Solution

The fourth proportional to 130.01, 179.42 and 90.72 is: 125.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    130.01 : 179.42 = 90.72 : x
  2. Step 2: Convert to fraction form
    130.01/179.42 = 90.72/x
  3. Step 3: Cross multiply
    130.01x = 179.42 × 90.72
  4. Step 4: Simplify right side
    130.01x = 16,276.53
  5. Step 5: Solve for x
    x = 16,276.53/130.01
  6. Step 6: Final answer
    x = 125.20

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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.