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Finding the Fourth Proportional to 73,015.86, 109,481.85 and 28,590.60

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Solution

The fourth proportional to 73,015.86, 109,481.85 and 28,590.60 is: 42,869.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,015.86 : 109,481.85 = 28,590.60 : x
  2. Step 2: Convert to fraction form
    73,015.86/109,481.85 = 28,590.60/x
  3. Step 3: Cross multiply
    73,015.86x = 109,481.85 × 28,590.60
  4. Step 4: Simplify right side
    73,015.86x = 3,130,151,780.61
  5. Step 5: Solve for x
    x = 3,130,151,780.61/73,015.86
  6. Step 6: Final answer
    x = 42,869.48

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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.