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Finding the Fourth Proportional to 138,240.08, 207,236.64 and 53,980.64

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Solution

The fourth proportional to 138,240.08, 207,236.64 and 53,980.64 is: 80,922.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,240.08 : 207,236.64 = 53,980.64 : x
  2. Step 2: Convert to fraction form
    138,240.08/207,236.64 = 53,980.64/x
  3. Step 3: Cross multiply
    138,240.08x = 207,236.64 × 53,980.64
  4. Step 4: Simplify right side
    138,240.08x = 11,186,766,458.65
  5. Step 5: Solve for x
    x = 11,186,766,458.65/138,240.08
  6. Step 6: Final answer
    x = 80,922.74

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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.