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Finding the Fourth Proportional to 539,403.93, 809,120.48 and 140,035.86

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Solution

The fourth proportional to 539,403.93, 809,120.48 and 140,035.86 is: 210,057.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    539,403.93 : 809,120.48 = 140,035.86 : x
  2. Step 2: Convert to fraction form
    539,403.93/809,120.48 = 140,035.86/x
  3. Step 3: Cross multiply
    539,403.93x = 809,120.48 × 140,035.86
  4. Step 4: Simplify right side
    539,403.93x = 113,305,881,560.23
  5. Step 5: Solve for x
    x = 113,305,881,560.23/539,403.93
  6. Step 6: Final answer
    x = 210,057.58

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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.