Home / 80,987.86-111,771.01-45,181.20

Finding the Fourth Proportional to 80,987.86, 111,771.01 and 45,181.20

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Solution

The fourth proportional to 80,987.86, 111,771.01 and 45,181.20 is: 62,354.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,987.86 : 111,771.01 = 45,181.20 : x
  2. Step 2: Convert to fraction form
    80,987.86/111,771.01 = 45,181.20/x
  3. Step 3: Cross multiply
    80,987.86x = 111,771.01 × 45,181.20
  4. Step 4: Simplify right side
    80,987.86x = 5,049,948,131.11
  5. Step 5: Solve for x
    x = 5,049,948,131.11/80,987.86
  6. Step 6: Final answer
    x = 62,354.39

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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.