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Finding the Fourth Proportional to 307,543.92, 461,392.68 and 85,926

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Solution

The fourth proportional to 307,543.92, 461,392.68 and 85,926 is: 128,910.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    307,543.92 : 461,392.68 = 85,926 : x
  2. Step 2: Convert to fraction form
    307,543.92/461,392.68 = 85,926/x
  3. Step 3: Cross multiply
    307,543.92x = 461,392.68 × 85,926
  4. Step 4: Simplify right side
    307,543.92x = 39,645,627,421.68
  5. Step 5: Solve for x
    x = 39,645,627,421.68/307,543.92
  6. Step 6: Final answer
    x = 128,910.46

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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.