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Finding the Fourth Proportional to 128,118.36, 191,919.96 and 63,882.68

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Solution

The fourth proportional to 128,118.36, 191,919.96 and 63,882.68 is: 95,695.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,118.36 : 191,919.96 = 63,882.68 : x
  2. Step 2: Convert to fraction form
    128,118.36/191,919.96 = 63,882.68/x
  3. Step 3: Cross multiply
    128,118.36x = 191,919.96 × 63,882.68
  4. Step 4: Simplify right side
    128,118.36x = 12,260,361,390.29
  5. Step 5: Solve for x
    x = 12,260,361,390.29/128,118.36
  6. Step 6: Final answer
    x = 95,695.58

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1.5x scale

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.