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Finding the Fourth Proportional to 64,931.46, 89,600.49 and 36,639.78

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Solution

The fourth proportional to 64,931.46, 89,600.49 and 36,639.78 is: 50,560.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,931.46 : 89,600.49 = 36,639.78 : x
  2. Step 2: Convert to fraction form
    64,931.46/89,600.49 = 36,639.78/x
  3. Step 3: Cross multiply
    64,931.46x = 89,600.49 × 36,639.78
  4. Step 4: Simplify right side
    64,931.46x = 3,282,942,241.49
  5. Step 5: Solve for x
    x = 3,282,942,241.49/64,931.46
  6. Step 6: Final answer
    x = 50,560.12

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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.