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Finding the Fourth Proportional to 345,357.48, 518,119.16 and 132,121.90

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Solution

The fourth proportional to 345,357.48, 518,119.16 and 132,121.90 is: 198,214.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    345,357.48 : 518,119.16 = 132,121.90 : x
  2. Step 2: Convert to fraction form
    345,357.48/518,119.16 = 132,121.90/x
  3. Step 3: Cross multiply
    345,357.48x = 518,119.16 × 132,121.90
  4. Step 4: Simplify right side
    345,357.48x = 68,454,887,845.60
  5. Step 5: Solve for x
    x = 68,454,887,845.60/345,357.48
  6. Step 6: Final answer
    x = 198,214.58

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.