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Finding the Fourth Proportional to 64,578.35, 89,120.10 and 39,089.37

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Solution

The fourth proportional to 64,578.35, 89,120.10 and 39,089.37 is: 53,944.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,578.35 : 89,120.10 = 39,089.37 : x
  2. Step 2: Convert to fraction form
    64,578.35/89,120.10 = 39,089.37/x
  3. Step 3: Cross multiply
    64,578.35x = 89,120.10 × 39,089.37
  4. Step 4: Simplify right side
    64,578.35x = 3,483,648,563.34
  5. Step 5: Solve for x
    x = 3,483,648,563.34/64,578.35
  6. Step 6: Final answer
    x = 53,944.53

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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.