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Finding the Fourth Proportional to 275,618.60, 413,403.60 and 75,921.20

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Solution

The fourth proportional to 275,618.60, 413,403.60 and 75,921.20 is: 113,875.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    275,618.60 : 413,403.60 = 75,921.20 : x
  2. Step 2: Convert to fraction form
    275,618.60/413,403.60 = 75,921.20/x
  3. Step 3: Cross multiply
    275,618.60x = 413,403.60 × 75,921.20
  4. Step 4: Simplify right side
    275,618.60x = 31,386,097,396.32
  5. Step 5: Solve for x
    x = 31,386,097,396.32/275,618.60
  6. Step 6: Final answer
    x = 113,875.11

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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.