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Finding the Fourth Proportional to 257,446.89, 386,196.26 and 67,920.36

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Solution

The fourth proportional to 257,446.89, 386,196.26 and 67,920.36 is: 101,887.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,446.89 : 386,196.26 = 67,920.36 : x
  2. Step 2: Convert to fraction form
    257,446.89/386,196.26 = 67,920.36/x
  3. Step 3: Cross multiply
    257,446.89x = 386,196.26 × 67,920.36
  4. Step 4: Simplify right side
    257,446.89x = 26,230,587,222.02
  5. Step 5: Solve for x
    x = 26,230,587,222.02/257,446.89
  6. Step 6: Final answer
    x = 101,887.37

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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.