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Finding the Fourth Proportional to 260,124.39, 390,217.82 and 91,609.88

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Solution

The fourth proportional to 260,124.39, 390,217.82 and 91,609.88 is: 137,425.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,124.39 : 390,217.82 = 91,609.88 : x
  2. Step 2: Convert to fraction form
    260,124.39/390,217.82 = 91,609.88/x
  3. Step 3: Cross multiply
    260,124.39x = 390,217.82 × 91,609.88
  4. Step 4: Simplify right side
    260,124.39x = 35,747,805,254.92
  5. Step 5: Solve for x
    x = 35,747,805,254.92/260,124.39
  6. Step 6: Final answer
    x = 137,425.81

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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.