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Finding the Fourth Proportional to 123,388.05, 170,187.44 and 85,162.05

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Solution

The fourth proportional to 123,388.05, 170,187.44 and 85,162.05 is: 117,462.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,388.05 : 170,187.44 = 85,162.05 : x
  2. Step 2: Convert to fraction form
    123,388.05/170,187.44 = 85,162.05/x
  3. Step 3: Cross multiply
    123,388.05x = 170,187.44 × 85,162.05
  4. Step 4: Simplify right side
    123,388.05x = 14,493,510,848.84
  5. Step 5: Solve for x
    x = 14,493,510,848.84/123,388.05
  6. Step 6: Final answer
    x = 117,462.84

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.