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Finding the Fourth Proportional to 64,991.07, 89,689.31 and 36,696.96

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Solution

The fourth proportional to 64,991.07, 89,689.31 and 36,696.96 is: 50,642.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,991.07 : 89,689.31 = 36,696.96 : x
  2. Step 2: Convert to fraction form
    64,991.07/89,689.31 = 36,696.96/x
  3. Step 3: Cross multiply
    64,991.07x = 89,689.31 × 36,696.96
  4. Step 4: Simplify right side
    64,991.07x = 3,291,324,838.01
  5. Step 5: Solve for x
    x = 3,291,324,838.01/64,991.07
  6. Step 6: Final answer
    x = 50,642.72

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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.