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Finding the Fourth Proportional to 267,619.81, 401,429.72 and 90,111.96

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Solution

The fourth proportional to 267,619.81, 401,429.72 and 90,111.96 is: 135,167.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    267,619.81 : 401,429.72 = 90,111.96 : x
  2. Step 2: Convert to fraction form
    267,619.81/401,429.72 = 90,111.96/x
  3. Step 3: Cross multiply
    267,619.81x = 401,429.72 × 90,111.96
  4. Step 4: Simplify right side
    267,619.81x = 36,173,618,871.45
  5. Step 5: Solve for x
    x = 36,173,618,871.45/267,619.81
  6. Step 6: Final answer
    x = 135,167.94

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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.