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Finding the Fourth Proportional to 138,493.44, 191,078.46 and 84,722.40

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Solution

The fourth proportional to 138,493.44, 191,078.46 and 84,722.40 is: 116,890.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,493.44 : 191,078.46 = 84,722.40 : x
  2. Step 2: Convert to fraction form
    138,493.44/191,078.46 = 84,722.40/x
  3. Step 3: Cross multiply
    138,493.44x = 191,078.46 × 84,722.40
  4. Step 4: Simplify right side
    138,493.44x = 16,188,625,719.50
  5. Step 5: Solve for x
    x = 16,188,625,719.50/138,493.44
  6. Step 6: Final answer
    x = 116,890.92

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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.