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Finding the Fourth Proportional to 345,356.48, 518,117.66 and 132,120.90

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Solution

The fourth proportional to 345,356.48, 518,117.66 and 132,120.90 is: 198,213.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    345,356.48 : 518,117.66 = 132,120.90 : x
  2. Step 2: Convert to fraction form
    345,356.48/518,117.66 = 132,120.90/x
  3. Step 3: Cross multiply
    345,356.48x = 518,117.66 × 132,120.90
  4. Step 4: Simplify right side
    345,356.48x = 68,454,171,545.09
  5. Step 5: Solve for x
    x = 68,454,171,545.09/345,356.48
  6. Step 6: Final answer
    x = 198,213.08

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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.