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Finding the Fourth Proportional to 361,408.30, 541,723.65 and 136,681.90

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Solution

The fourth proportional to 361,408.30, 541,723.65 and 136,681.90 is: 204,875.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    361,408.30 : 541,723.65 = 136,681.90 : x
  2. Step 2: Convert to fraction form
    361,408.30/541,723.65 = 136,681.90/x
  3. Step 3: Cross multiply
    361,408.30x = 541,723.65 × 136,681.90
  4. Step 4: Simplify right side
    361,408.30x = 74,043,817,756.94
  5. Step 5: Solve for x
    x = 74,043,817,756.94/361,408.30
  6. Step 6: Final answer
    x = 204,875.81

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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.