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Finding the Fourth Proportional to 90,212.94, 135,424.14 and 52,799.88

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Solution

The fourth proportional to 90,212.94, 135,424.14 and 52,799.88 is: 79,261.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,212.94 : 135,424.14 = 52,799.88 : x
  2. Step 2: Convert to fraction form
    90,212.94/135,424.14 = 52,799.88/x
  3. Step 3: Cross multiply
    90,212.94x = 135,424.14 × 52,799.88
  4. Step 4: Simplify right side
    90,212.94x = 7,150,378,341.10
  5. Step 5: Solve for x
    x = 7,150,378,341.10/90,212.94
  6. Step 6: Final answer
    x = 79,261.12

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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.