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Finding the Fourth Proportional to 66,069.46, 91,146.09 and 39,213.10

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Solution

The fourth proportional to 66,069.46, 91,146.09 and 39,213.10 is: 54,096.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,069.46 : 91,146.09 = 39,213.10 : x
  2. Step 2: Convert to fraction form
    66,069.46/91,146.09 = 39,213.10/x
  3. Step 3: Cross multiply
    66,069.46x = 91,146.09 × 39,213.10
  4. Step 4: Simplify right side
    66,069.46x = 3,574,120,741.78
  5. Step 5: Solve for x
    x = 3,574,120,741.78/66,069.46
  6. Step 6: Final answer
    x = 54,096.41

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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.