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Finding the Fourth Proportional to 120,719.60, 181,079.40 and 73,998.80

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Solution

The fourth proportional to 120,719.60, 181,079.40 and 73,998.80 is: 110,998.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,719.60 : 181,079.40 = 73,998.80 : x
  2. Step 2: Convert to fraction form
    120,719.60/181,079.40 = 73,998.80/x
  3. Step 3: Cross multiply
    120,719.60x = 181,079.40 × 73,998.80
  4. Step 4: Simplify right side
    120,719.60x = 13,399,658,304.72
  5. Step 5: Solve for x
    x = 13,399,658,304.72/120,719.60
  6. Step 6: Final answer
    x = 110,998.20

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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.