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Finding the Fourth Proportional to 64,996.87, 89,696.27 and 38,139.82

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Solution

The fourth proportional to 64,996.87, 89,696.27 and 38,139.82 is: 52,633.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,996.87 : 89,696.27 = 38,139.82 : x
  2. Step 2: Convert to fraction form
    64,996.87/89,696.27 = 38,139.82/x
  3. Step 3: Cross multiply
    64,996.87x = 89,696.27 × 38,139.82
  4. Step 4: Simplify right side
    64,996.87x = 3,420,999,968.12
  5. Step 5: Solve for x
    x = 3,420,999,968.12/64,996.87
  6. Step 6: Final answer
    x = 52,633.30

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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.