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Finding the Fourth Proportional to 130.07, 179.48 and 71.85

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Solution

The fourth proportional to 130.07, 179.48 and 71.85 is: 99.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    130.07 : 179.48 = 71.85 : x
  2. Step 2: Convert to fraction form
    130.07/179.48 = 71.85/x
  3. Step 3: Cross multiply
    130.07x = 179.48 × 71.85
  4. Step 4: Simplify right side
    130.07x = 12,895.64
  5. Step 5: Solve for x
    x = 12,895.64/130.07
  6. Step 6: Final answer
    x = 99.14

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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.