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Finding the Fourth Proportional to 138,441.56, 207,652.61 and 79,091.24

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Solution

The fourth proportional to 138,441.56, 207,652.61 and 79,091.24 is: 118,631.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,441.56 : 207,652.61 = 79,091.24 : x
  2. Step 2: Convert to fraction form
    138,441.56/207,652.61 = 79,091.24/x
  3. Step 3: Cross multiply
    138,441.56x = 207,652.61 × 79,091.24
  4. Step 4: Simplify right side
    138,441.56x = 16,423,501,573.60
  5. Step 5: Solve for x
    x = 16,423,501,573.60/138,441.56
  6. Step 6: Final answer
    x = 118,631.30

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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.