Home / 90,727.80-136,091.70-80,878.20

Finding the Fourth Proportional to 90,727.80, 136,091.70 and 80,878.20

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Solution

The fourth proportional to 90,727.80, 136,091.70 and 80,878.20 is: 121,317.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,727.80 : 136,091.70 = 80,878.20 : x
  2. Step 2: Convert to fraction form
    90,727.80/136,091.70 = 80,878.20/x
  3. Step 3: Cross multiply
    90,727.80x = 136,091.70 × 80,878.20
  4. Step 4: Simplify right side
    90,727.80x = 11,006,851,730.94
  5. Step 5: Solve for x
    x = 11,006,851,730.94/90,727.80
  6. Step 6: Final answer
    x = 121,317.30

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.