Home / 111,378.24-166,771.80-87,120.72

Finding the Fourth Proportional to 111,378.24, 166,771.80 and 87,120.72

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Solution

The fourth proportional to 111,378.24, 166,771.80 and 87,120.72 is: 130,449.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,378.24 : 166,771.80 = 87,120.72 : x
  2. Step 2: Convert to fraction form
    111,378.24/166,771.80 = 87,120.72/x
  3. Step 3: Cross multiply
    111,378.24x = 166,771.80 × 87,120.72
  4. Step 4: Simplify right side
    111,378.24x = 14,529,279,291.70
  5. Step 5: Solve for x
    x = 14,529,279,291.70/111,378.24
  6. Step 6: Final answer
    x = 130,449.89

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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.