Home / 120,209.77-165,833.62-77,781.97

Finding the Fourth Proportional to 120,209.77, 165,833.62 and 77,781.97

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Solution

The fourth proportional to 120,209.77, 165,833.62 and 77,781.97 is: 107,302.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,209.77 : 165,833.62 = 77,781.97 : x
  2. Step 2: Convert to fraction form
    120,209.77/165,833.62 = 77,781.97/x
  3. Step 3: Cross multiply
    120,209.77x = 165,833.62 × 77,781.97
  4. Step 4: Simplify right side
    120,209.77x = 12,898,865,655.83
  5. Step 5: Solve for x
    x = 12,898,865,655.83/120,209.77
  6. Step 6: Final answer
    x = 107,302.97

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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.