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Finding the Fourth Proportional to 66,013.69, 91,104.65 and 36,211.45

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Solution

The fourth proportional to 66,013.69, 91,104.65 and 36,211.45 is: 49,974.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,013.69 : 91,104.65 = 36,211.45 : x
  2. Step 2: Convert to fraction form
    66,013.69/91,104.65 = 36,211.45/x
  3. Step 3: Cross multiply
    66,013.69x = 91,104.65 × 36,211.45
  4. Step 4: Simplify right side
    66,013.69x = 3,299,031,478.24
  5. Step 5: Solve for x
    x = 3,299,031,478.24/66,013.69
  6. Step 6: Final answer
    x = 49,974.96

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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.