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Finding the Fourth Proportional to 64,309.78, 88,697.97 and 38,789.54

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Solution

The fourth proportional to 64,309.78, 88,697.97 and 38,789.54 is: 53,499.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,309.78 : 88,697.97 = 38,789.54 : x
  2. Step 2: Convert to fraction form
    64,309.78/88,697.97 = 38,789.54/x
  3. Step 3: Cross multiply
    64,309.78x = 88,697.97 × 38,789.54
  4. Step 4: Simplify right side
    64,309.78x = 3,440,553,455.23
  5. Step 5: Solve for x
    x = 3,440,553,455.23/64,309.78
  6. Step 6: Final answer
    x = 53,499.69

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.