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Finding the Fourth Proportional to 64,438.09, 88,918.63 and 36,138.31

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Solution

The fourth proportional to 64,438.09, 88,918.63 and 36,138.31 is: 49,867.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,438.09 : 88,918.63 = 36,138.31 : x
  2. Step 2: Convert to fraction form
    64,438.09/88,918.63 = 36,138.31/x
  3. Step 3: Cross multiply
    64,438.09x = 88,918.63 × 36,138.31
  4. Step 4: Simplify right side
    64,438.09x = 3,213,369,015.72
  5. Step 5: Solve for x
    x = 3,213,369,015.72/64,438.09
  6. Step 6: Final answer
    x = 49,867.54

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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.