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Finding the Fourth Proportional to 138,773.36, 191,510.72 and 85,087.97

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Solution

The fourth proportional to 138,773.36, 191,510.72 and 85,087.97 is: 117,423.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,773.36 : 191,510.72 = 85,087.97 : x
  2. Step 2: Convert to fraction form
    138,773.36/191,510.72 = 85,087.97/x
  3. Step 3: Cross multiply
    138,773.36x = 191,510.72 × 85,087.97
  4. Step 4: Simplify right side
    138,773.36x = 16,295,257,015.05
  5. Step 5: Solve for x
    x = 16,295,257,015.05/138,773.36
  6. Step 6: Final answer
    x = 117,423.53

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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.