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Finding the Fourth Proportional to 66,080.65, 91,149.81 and 39,204.13

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Solution

The fourth proportional to 66,080.65, 91,149.81 and 39,204.13 is: 54,077.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,080.65 : 91,149.81 = 39,204.13 : x
  2. Step 2: Convert to fraction form
    66,080.65/91,149.81 = 39,204.13/x
  3. Step 3: Cross multiply
    66,080.65x = 91,149.81 × 39,204.13
  4. Step 4: Simplify right side
    66,080.65x = 3,573,449,000.72
  5. Step 5: Solve for x
    x = 3,573,449,000.72/66,080.65
  6. Step 6: Final answer
    x = 54,077.09

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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.