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Finding the Fourth Proportional to 66,659.90, 91,996.36 and 37,988.32

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Solution

The fourth proportional to 66,659.90, 91,996.36 and 37,988.32 is: 52,427.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,659.90 : 91,996.36 = 37,988.32 : x
  2. Step 2: Convert to fraction form
    66,659.90/91,996.36 = 37,988.32/x
  3. Step 3: Cross multiply
    66,659.90x = 91,996.36 × 37,988.32
  4. Step 4: Simplify right side
    66,659.90x = 3,494,787,162.52
  5. Step 5: Solve for x
    x = 3,494,787,162.52/66,659.90
  6. Step 6: Final answer
    x = 52,427.13

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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.