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Finding the Fourth Proportional to 66,586.88, 91,889.89 and 36,780.80

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Solution

The fourth proportional to 66,586.88, 91,889.89 and 36,780.80 is: 50,757.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,586.88 : 91,889.89 = 36,780.80 : x
  2. Step 2: Convert to fraction form
    66,586.88/91,889.89 = 36,780.80/x
  3. Step 3: Cross multiply
    66,586.88x = 91,889.89 × 36,780.80
  4. Step 4: Simplify right side
    66,586.88x = 3,379,783,666.11
  5. Step 5: Solve for x
    x = 3,379,783,666.11/66,586.88
  6. Step 6: Final answer
    x = 50,757.50

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1.5x scale

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.