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Finding the Fourth Proportional to 138,508.94, 191,099.80 and 84,737.90

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Solution

The fourth proportional to 138,508.94, 191,099.80 and 84,737.90 is: 116,912.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,508.94 : 191,099.80 = 84,737.90 : x
  2. Step 2: Convert to fraction form
    138,508.94/191,099.80 = 84,737.90/x
  3. Step 3: Cross multiply
    138,508.94x = 191,099.80 × 84,737.90
  4. Step 4: Simplify right side
    138,508.94x = 16,193,395,742.42
  5. Step 5: Solve for x
    x = 16,193,395,742.42/138,508.94
  6. Step 6: Final answer
    x = 116,912.28

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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.