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Finding the Fourth Proportional to 64,996.91, 89,696.34 and 38,139.87

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Solution

The fourth proportional to 64,996.91, 89,696.34 and 38,139.87 is: 52,633.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,996.91 : 89,696.34 = 38,139.87 : x
  2. Step 2: Convert to fraction form
    64,996.91/89,696.34 = 38,139.87/x
  3. Step 3: Cross multiply
    64,996.91x = 89,696.34 × 38,139.87
  4. Step 4: Simplify right side
    64,996.91x = 3,421,006,568.30
  5. Step 5: Solve for x
    x = 3,421,006,568.30/64,996.91
  6. Step 6: Final answer
    x = 52,633.37

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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.