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Finding the Fourth Proportional to 267,619.31, 401,428.97 and 90,111.46

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Solution

The fourth proportional to 267,619.31, 401,428.97 and 90,111.46 is: 135,167.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    267,619.31 : 401,428.97 = 90,111.46 : x
  2. Step 2: Convert to fraction form
    267,619.31/401,428.97 = 90,111.46/x
  3. Step 3: Cross multiply
    267,619.31x = 401,428.97 × 90,111.46
  4. Step 4: Simplify right side
    267,619.31x = 36,173,350,573.00
  5. Step 5: Solve for x
    x = 36,173,350,573.00/267,619.31
  6. Step 6: Final answer
    x = 135,167.19

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.