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Finding the Fourth Proportional to 64,438.59, 88,919.33 and 36,138.81

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Solution

The fourth proportional to 64,438.59, 88,919.33 and 36,138.81 is: 49,868.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,438.59 : 88,919.33 = 36,138.81 : x
  2. Step 2: Convert to fraction form
    64,438.59/88,919.33 = 36,138.81/x
  3. Step 3: Cross multiply
    64,438.59x = 88,919.33 × 36,138.81
  4. Step 4: Simplify right side
    64,438.59x = 3,213,438,591.50
  5. Step 5: Solve for x
    x = 3,213,438,591.50/64,438.59
  6. Step 6: Final answer
    x = 49,868.23

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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.