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Finding the Fourth Proportional to 64,930.96, 89,599.80 and 36,639.28

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Solution

The fourth proportional to 64,930.96, 89,599.80 and 36,639.28 is: 50,559.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,930.96 : 89,599.80 = 36,639.28 : x
  2. Step 2: Convert to fraction form
    64,930.96/89,599.80 = 36,639.28/x
  3. Step 3: Cross multiply
    64,930.96x = 89,599.80 × 36,639.28
  4. Step 4: Simplify right side
    64,930.96x = 3,282,872,160.14
  5. Step 5: Solve for x
    x = 3,282,872,160.14/64,930.96
  6. Step 6: Final answer
    x = 50,559.43

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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.