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Finding the Fourth Proportional to 66,239.25, 91,410.17 and 36,431.25

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Solution

The fourth proportional to 66,239.25, 91,410.17 and 36,431.25 is: 50,275.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,239.25 : 91,410.17 = 36,431.25 : x
  2. Step 2: Convert to fraction form
    66,239.25/91,410.17 = 36,431.25/x
  3. Step 3: Cross multiply
    66,239.25x = 91,410.17 × 36,431.25
  4. Step 4: Simplify right side
    66,239.25x = 3,330,186,573.66
  5. Step 5: Solve for x
    x = 3,330,186,573.66/66,239.25
  6. Step 6: Final answer
    x = 50,275.13

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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.