Home / 120,918.20-181,290.90-54,303.80

Finding the Fourth Proportional to 120,918.20, 181,290.90 and 54,303.80

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Solution

The fourth proportional to 120,918.20, 181,290.90 and 54,303.80 is: 81,416.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,918.20 : 181,290.90 = 54,303.80 : x
  2. Step 2: Convert to fraction form
    120,918.20/181,290.90 = 54,303.80/x
  3. Step 3: Cross multiply
    120,918.20x = 181,290.90 × 54,303.80
  4. Step 4: Simplify right side
    120,918.20x = 9,844,784,775.42
  5. Step 5: Solve for x
    x = 9,844,784,775.42/120,918.20
  6. Step 6: Final answer
    x = 81,416.90

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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.