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Finding the Fourth Proportional to 66,890.42, 92,309.82 and 36,678.50

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Solution

The fourth proportional to 66,890.42, 92,309.82 and 36,678.50 is: 50,616.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,890.42 : 92,309.82 = 36,678.50 : x
  2. Step 2: Convert to fraction form
    66,890.42/92,309.82 = 36,678.50/x
  3. Step 3: Cross multiply
    66,890.42x = 92,309.82 × 36,678.50
  4. Step 4: Simplify right side
    66,890.42x = 3,385,785,732.87
  5. Step 5: Solve for x
    x = 3,385,785,732.87/66,890.42
  6. Step 6: Final answer
    x = 50,616.90

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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.