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Finding the Fourth Proportional to 135,793.40, 203,611.16 and 90,866.12

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Solution

The fourth proportional to 135,793.40, 203,611.16 and 90,866.12 is: 136,246.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,793.40 : 203,611.16 = 90,866.12 : x
  2. Step 2: Convert to fraction form
    135,793.40/203,611.16 = 90,866.12/x
  3. Step 3: Cross multiply
    135,793.40x = 203,611.16 × 90,866.12
  4. Step 4: Simplify right side
    135,793.40x = 18,501,354,625.51
  5. Step 5: Solve for x
    x = 18,501,354,625.51/135,793.40
  6. Step 6: Final answer
    x = 136,246.35

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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.