Home / 80,987.62-111,771.57-45,190.06

Finding the Fourth Proportional to 80,987.62, 111,771.57 and 45,190.06

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Solution

The fourth proportional to 80,987.62, 111,771.57 and 45,190.06 is: 62,367.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,987.62 : 111,771.57 = 45,190.06 : x
  2. Step 2: Convert to fraction form
    80,987.62/111,771.57 = 45,190.06/x
  3. Step 3: Cross multiply
    80,987.62x = 111,771.57 × 45,190.06
  4. Step 4: Simplify right side
    80,987.62x = 5,050,963,954.59
  5. Step 5: Solve for x
    x = 5,050,963,954.59/80,987.62
  6. Step 6: Final answer
    x = 62,367.11

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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.