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Finding the Fourth Proportional to 345,984.60, 518,879.70 and 109,399.80

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Solution

The fourth proportional to 345,984.60, 518,879.70 and 109,399.80 is: 164,068.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    345,984.60 : 518,879.70 = 109,399.80 : x
  2. Step 2: Convert to fraction form
    345,984.60/518,879.70 = 109,399.80/x
  3. Step 3: Cross multiply
    345,984.60x = 518,879.70 × 109,399.80
  4. Step 4: Simplify right side
    345,984.60x = 56,765,335,404.06
  5. Step 5: Solve for x
    x = 56,765,335,404.06/345,984.60
  6. Step 6: Final answer
    x = 164,068.97

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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.