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Finding the Fourth Proportional to 66,090.82, 91,210.80 and 37,801.96

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Solution

The fourth proportional to 66,090.82, 91,210.80 and 37,801.96 is: 52,169.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,090.82 : 91,210.80 = 37,801.96 : x
  2. Step 2: Convert to fraction form
    66,090.82/91,210.80 = 37,801.96/x
  3. Step 3: Cross multiply
    66,090.82x = 91,210.80 × 37,801.96
  4. Step 4: Simplify right side
    66,090.82x = 3,447,947,013.17
  5. Step 5: Solve for x
    x = 3,447,947,013.17/66,090.82
  6. Step 6: Final answer
    x = 52,169.83

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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.