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Finding the Fourth Proportional to 84,611.96, 126,793.31 and 47,120.51

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Solution

The fourth proportional to 84,611.96, 126,793.31 and 47,120.51 is: 70,611.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,611.96 : 126,793.31 = 47,120.51 : x
  2. Step 2: Convert to fraction form
    84,611.96/126,793.31 = 47,120.51/x
  3. Step 3: Cross multiply
    84,611.96x = 126,793.31 × 47,120.51
  4. Step 4: Simplify right side
    84,611.96x = 5,974,565,431.79
  5. Step 5: Solve for x
    x = 5,974,565,431.79/84,611.96
  6. Step 6: Final answer
    x = 70,611.36

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.