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Finding the Fourth Proportional to 253,893.32, 381,068.40 and 135,665.72

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Solution

The fourth proportional to 253,893.32, 381,068.40 and 135,665.72 is: 203,620.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    253,893.32 : 381,068.40 = 135,665.72 : x
  2. Step 2: Convert to fraction form
    253,893.32/381,068.40 = 135,665.72/x
  3. Step 3: Cross multiply
    253,893.32x = 381,068.40 × 135,665.72
  4. Step 4: Simplify right side
    253,893.32x = 51,697,918,855.25
  5. Step 5: Solve for x
    x = 51,697,918,855.25/253,893.32
  6. Step 6: Final answer
    x = 203,620.63

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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.