Home / 120,729.20-181,085.70-31,980.80

Finding the Fourth Proportional to 120,729.20, 181,085.70 and 31,980.80

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Solution

The fourth proportional to 120,729.20, 181,085.70 and 31,980.80 is: 47,969.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,729.20 : 181,085.70 = 31,980.80 : x
  2. Step 2: Convert to fraction form
    120,729.20/181,085.70 = 31,980.80/x
  3. Step 3: Cross multiply
    120,729.20x = 181,085.70 × 31,980.80
  4. Step 4: Simplify right side
    120,729.20x = 5,791,265,554.56
  5. Step 5: Solve for x
    x = 5,791,265,554.56/120,729.20
  6. Step 6: Final answer
    x = 47,969.05

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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.