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Finding the Fourth Proportional to 64,930.42, 89,604.06 and 36,638.74

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Solution

The fourth proportional to 64,930.42, 89,604.06 and 36,638.74 is: 50,561.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,930.42 : 89,604.06 = 36,638.74 : x
  2. Step 2: Convert to fraction form
    64,930.42/89,604.06 = 36,638.74/x
  3. Step 3: Cross multiply
    64,930.42x = 89,604.06 × 36,638.74
  4. Step 4: Simplify right side
    64,930.42x = 3,282,979,857.28
  5. Step 5: Solve for x
    x = 3,282,979,857.28/64,930.42
  6. Step 6: Final answer
    x = 50,561.51

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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.