Home / 120,286.08-165,997.44-77,918.28

Finding the Fourth Proportional to 120,286.08, 165,997.44 and 77,918.28

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Solution

The fourth proportional to 120,286.08, 165,997.44 and 77,918.28 is: 107,528.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,286.08 : 165,997.44 = 77,918.28 : x
  2. Step 2: Convert to fraction form
    120,286.08/165,997.44 = 77,918.28/x
  3. Step 3: Cross multiply
    120,286.08x = 165,997.44 × 77,918.28
  4. Step 4: Simplify right side
    120,286.08x = 12,934,235,009.20
  5. Step 5: Solve for x
    x = 12,934,235,009.20/120,286.08
  6. Step 6: Final answer
    x = 107,528.94

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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.