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Finding the Fourth Proportional to 260,057.52, 390,198.97 and 91,698.11

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Solution

The fourth proportional to 260,057.52, 390,198.97 and 91,698.11 is: 137,586.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,057.52 : 390,198.97 = 91,698.11 : x
  2. Step 2: Convert to fraction form
    260,057.52/390,198.97 = 91,698.11/x
  3. Step 3: Cross multiply
    260,057.52x = 390,198.97 × 91,698.11
  4. Step 4: Simplify right side
    260,057.52x = 35,780,507,699.82
  5. Step 5: Solve for x
    x = 35,780,507,699.82/260,057.52
  6. Step 6: Final answer
    x = 137,586.90

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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.