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Finding the Fourth Proportional to 123,709.76, 170,719.44 and 69,993.68

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Solution

The fourth proportional to 123,709.76, 170,719.44 and 69,993.68 is: 96,591.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,709.76 : 170,719.44 = 69,993.68 : x
  2. Step 2: Convert to fraction form
    123,709.76/170,719.44 = 69,993.68/x
  3. Step 3: Cross multiply
    123,709.76x = 170,719.44 × 69,993.68
  4. Step 4: Simplify right side
    123,709.76x = 11,949,281,853.14
  5. Step 5: Solve for x
    x = 11,949,281,853.14/123,709.76
  6. Step 6: Final answer
    x = 96,591.26

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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.