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Finding the Fourth Proportional to 345,355.48, 518,116.16 and 132,119.90

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Solution

The fourth proportional to 345,355.48, 518,116.16 and 132,119.90 is: 198,211.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    345,355.48 : 518,116.16 = 132,119.90 : x
  2. Step 2: Convert to fraction form
    345,355.48/518,116.16 = 132,119.90/x
  3. Step 3: Cross multiply
    345,355.48x = 518,116.16 × 132,119.90
  4. Step 4: Simplify right side
    345,355.48x = 68,453,455,247.58
  5. Step 5: Solve for x
    x = 68,453,455,247.58/345,355.48
  6. Step 6: Final answer
    x = 198,211.58

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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.