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Finding the Fourth Proportional to 66,090.01, 91,162.63 and 39,213.44

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Solution

The fourth proportional to 66,090.01, 91,162.63 and 39,213.44 is: 54,089.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,090.01 : 91,162.63 = 39,213.44 : x
  2. Step 2: Convert to fraction form
    66,090.01/91,162.63 = 39,213.44/x
  3. Step 3: Cross multiply
    66,090.01x = 91,162.63 × 39,213.44
  4. Step 4: Simplify right side
    66,090.01x = 3,574,800,125.68
  5. Step 5: Solve for x
    x = 3,574,800,125.68/66,090.01
  6. Step 6: Final answer
    x = 54,089.88

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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.