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Finding the Fourth Proportional to 65,901.78, 90,940.86 and 39,046.77

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Solution

The fourth proportional to 65,901.78, 90,940.86 and 39,046.77 is: 53,882.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,901.78 : 90,940.86 = 39,046.77 : x
  2. Step 2: Convert to fraction form
    65,901.78/90,940.86 = 39,046.77/x
  3. Step 3: Cross multiply
    65,901.78x = 90,940.86 × 39,046.77
  4. Step 4: Simplify right side
    65,901.78x = 3,550,946,844.02
  5. Step 5: Solve for x
    x = 3,550,946,844.02/65,901.78
  6. Step 6: Final answer
    x = 53,882.41

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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.