Home / 80,520.90-111,223.41-61,283.79

Finding the Fourth Proportional to 80,520.90, 111,223.41 and 61,283.79

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Solution

The fourth proportional to 80,520.90, 111,223.41 and 61,283.79 is: 84,651.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,520.90 : 111,223.41 = 61,283.79 : x
  2. Step 2: Convert to fraction form
    80,520.90/111,223.41 = 61,283.79/x
  3. Step 3: Cross multiply
    80,520.90x = 111,223.41 × 61,283.79
  4. Step 4: Simplify right side
    80,520.90x = 6,816,192,101.52
  5. Step 5: Solve for x
    x = 6,816,192,101.52/80,520.90
  6. Step 6: Final answer
    x = 84,651.22

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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.