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Finding the Fourth Proportional to 66,245.85, 91,420.46 and 36,031.84

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Solution

The fourth proportional to 66,245.85, 91,420.46 and 36,031.84 is: 49,724.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,245.85 : 91,420.46 = 36,031.84 : x
  2. Step 2: Convert to fraction form
    66,245.85/91,420.46 = 36,031.84/x
  3. Step 3: Cross multiply
    66,245.85x = 91,420.46 × 36,031.84
  4. Step 4: Simplify right side
    66,245.85x = 3,294,047,207.29
  5. Step 5: Solve for x
    x = 3,294,047,207.29/66,245.85
  6. Step 6: Final answer
    x = 49,724.58

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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.