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Finding the Fourth Proportional to 64,388.87, 96,582.85 and 20,015.55

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Solution

The fourth proportional to 64,388.87, 96,582.85 and 20,015.55 is: 30,023.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,388.87 : 96,582.85 = 20,015.55 : x
  2. Step 2: Convert to fraction form
    64,388.87/96,582.85 = 20,015.55/x
  3. Step 3: Cross multiply
    64,388.87x = 96,582.85 × 20,015.55
  4. Step 4: Simplify right side
    64,388.87x = 1,933,158,813.28
  5. Step 5: Solve for x
    x = 1,933,158,813.28/64,388.87
  6. Step 6: Final answer
    x = 30,023.18

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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.