Home / 87,909.86-121,324.30-50,189.78

Finding the Fourth Proportional to 87,909.86, 121,324.30 and 50,189.78

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Solution

The fourth proportional to 87,909.86, 121,324.30 and 50,189.78 is: 69,266.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,909.86 : 121,324.30 = 50,189.78 : x
  2. Step 2: Convert to fraction form
    87,909.86/121,324.30 = 50,189.78/x
  3. Step 3: Cross multiply
    87,909.86x = 121,324.30 × 50,189.78
  4. Step 4: Simplify right side
    87,909.86x = 6,089,239,925.65
  5. Step 5: Solve for x
    x = 6,089,239,925.65/87,909.86
  6. Step 6: Final answer
    x = 69,266.86

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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.