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Finding the Fourth Proportional to 138,486.15, 191,015.82 and 84,797.73

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Solution

The fourth proportional to 138,486.15, 191,015.82 and 84,797.73 is: 116,962.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,486.15 : 191,015.82 = 84,797.73 : x
  2. Step 2: Convert to fraction form
    138,486.15/191,015.82 = 84,797.73/x
  3. Step 3: Cross multiply
    138,486.15x = 191,015.82 × 84,797.73
  4. Step 4: Simplify right side
    138,486.15x = 16,197,707,930.09
  5. Step 5: Solve for x
    x = 16,197,707,930.09/138,486.15
  6. Step 6: Final answer
    x = 116,962.66

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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.