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Finding the Fourth Proportional to 135,999.90, 203,800.65 and 121,959.90

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Solution

The fourth proportional to 135,999.90, 203,800.65 and 121,959.90 is: 182,761.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,999.90 : 203,800.65 = 121,959.90 : x
  2. Step 2: Convert to fraction form
    135,999.90/203,800.65 = 121,959.90/x
  3. Step 3: Cross multiply
    135,999.90x = 203,800.65 × 121,959.90
  4. Step 4: Simplify right side
    135,999.90x = 24,855,506,893.94
  5. Step 5: Solve for x
    x = 24,855,506,893.94/135,999.90
  6. Step 6: Final answer
    x = 182,761.21

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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.