Home / 120,515.80-180,758.26-31,776.28

Finding the Fourth Proportional to 120,515.80, 180,758.26 and 31,776.28

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Solution

The fourth proportional to 120,515.80, 180,758.26 and 31,776.28 is: 47,660.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,515.80 : 180,758.26 = 31,776.28 : x
  2. Step 2: Convert to fraction form
    120,515.80/180,758.26 = 31,776.28/x
  3. Step 3: Cross multiply
    120,515.80x = 180,758.26 × 31,776.28
  4. Step 4: Simplify right side
    120,515.80x = 5,743,825,082.07
  5. Step 5: Solve for x
    x = 5,743,825,082.07/120,515.80
  6. Step 6: Final answer
    x = 47,660.35

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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.