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Finding the Fourth Proportional to 121,324.60, 181,986.90 and 79,334.20

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Solution

The fourth proportional to 121,324.60, 181,986.90 and 79,334.20 is: 119,001.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,324.60 : 181,986.90 = 79,334.20 : x
  2. Step 2: Convert to fraction form
    121,324.60/181,986.90 = 79,334.20/x
  3. Step 3: Cross multiply
    121,324.60x = 181,986.90 × 79,334.20
  4. Step 4: Simplify right side
    121,324.60x = 14,437,785,121.98
  5. Step 5: Solve for x
    x = 14,437,785,121.98/121,324.60
  6. Step 6: Final answer
    x = 119,001.30

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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.