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Finding the Fourth Proportional to 361,659.51, 542,415.15 and 136,942.43

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Solution

The fourth proportional to 361,659.51, 542,415.15 and 136,942.43 is: 205,385.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    361,659.51 : 542,415.15 = 136,942.43 : x
  2. Step 2: Convert to fraction form
    361,659.51/542,415.15 = 136,942.43/x
  3. Step 3: Cross multiply
    361,659.51x = 542,415.15 × 136,942.43
  4. Step 4: Simplify right side
    361,659.51x = 74,279,645,997.74
  5. Step 5: Solve for x
    x = 74,279,645,997.74/361,659.51
  6. Step 6: Final answer
    x = 205,385.57

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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.