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Finding the Fourth Proportional to 64,699.73, 89,285.44 and 36,405.42

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Solution

The fourth proportional to 64,699.73, 89,285.44 and 36,405.42 is: 50,239.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,699.73 : 89,285.44 = 36,405.42 : x
  2. Step 2: Convert to fraction form
    64,699.73/89,285.44 = 36,405.42/x
  3. Step 3: Cross multiply
    64,699.73x = 89,285.44 × 36,405.42
  4. Step 4: Simplify right side
    64,699.73x = 3,250,473,943.08
  5. Step 5: Solve for x
    x = 3,250,473,943.08/64,699.73
  6. Step 6: Final answer
    x = 50,239.37

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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.