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Finding the Fourth Proportional to 128,108.36, 191,904.98 and 63,872.68

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Solution

The fourth proportional to 128,108.36, 191,904.98 and 63,872.68 is: 95,680.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,108.36 : 191,904.98 = 63,872.68 : x
  2. Step 2: Convert to fraction form
    128,108.36/191,904.98 = 63,872.68/x
  3. Step 3: Cross multiply
    128,108.36x = 191,904.98 × 63,872.68
  4. Step 4: Simplify right side
    128,108.36x = 12,257,485,377.95
  5. Step 5: Solve for x
    x = 12,257,485,377.95/128,108.36
  6. Step 6: Final answer
    x = 95,680.60

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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.