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Finding the Fourth Proportional to 138,794.16, 191,646.36 and 128,179.92

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Solution

The fourth proportional to 138,794.16, 191,646.36 and 128,179.92 is: 176,990.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,794.16 : 191,646.36 = 128,179.92 : x
  2. Step 2: Convert to fraction form
    138,794.16/191,646.36 = 128,179.92/x
  3. Step 3: Cross multiply
    138,794.16x = 191,646.36 × 128,179.92
  4. Step 4: Simplify right side
    138,794.16x = 24,565,215,093.09
  5. Step 5: Solve for x
    x = 24,565,215,093.09/138,794.16
  6. Step 6: Final answer
    x = 176,990.26

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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.