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Finding the Fourth Proportional to 100,477.92, 138,650.84 and 55,155.74

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Solution

The fourth proportional to 100,477.92, 138,650.84 and 55,155.74 is: 76,110.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,477.92 : 138,650.84 = 55,155.74 : x
  2. Step 2: Convert to fraction form
    100,477.92/138,650.84 = 55,155.74/x
  3. Step 3: Cross multiply
    100,477.92x = 138,650.84 × 55,155.74
  4. Step 4: Simplify right side
    100,477.92x = 7,647,388,919.62
  5. Step 5: Solve for x
    x = 7,647,388,919.62/100,477.92
  6. Step 6: Final answer
    x = 76,110.15

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.