Home / 120,287.08-165,998.82-77,919.28

Finding the Fourth Proportional to 120,287.08, 165,998.82 and 77,919.28

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Solution

The fourth proportional to 120,287.08, 165,998.82 and 77,919.28 is: 107,530.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,287.08 : 165,998.82 = 77,919.28 : x
  2. Step 2: Convert to fraction form
    120,287.08/165,998.82 = 77,919.28/x
  3. Step 3: Cross multiply
    120,287.08x = 165,998.82 × 77,919.28
  4. Step 4: Simplify right side
    120,287.08x = 12,934,508,535.25
  5. Step 5: Solve for x
    x = 12,934,508,535.25/120,287.08
  6. Step 6: Final answer
    x = 107,530.32

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1.5x scale

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.