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Finding the Fourth Proportional to 64,539, 89,072.44 and 39,065.92

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Solution

The fourth proportional to 64,539, 89,072.44 and 39,065.92 is: 53,916.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,539 : 89,072.44 = 39,065.92 : x
  2. Step 2: Convert to fraction form
    64,539/89,072.44 = 39,065.92/x
  3. Step 3: Cross multiply
    64,539x = 89,072.44 × 39,065.92
  4. Step 4: Simplify right side
    64,539x = 3,479,696,815.24
  5. Step 5: Solve for x
    x = 3,479,696,815.24/64,539
  6. Step 6: Final answer
    x = 53,916.19

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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.