Home / 111,553.45-167,330.52-78,421.75

Finding the Fourth Proportional to 111,553.45, 167,330.52 and 78,421.75

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Solution

The fourth proportional to 111,553.45, 167,330.52 and 78,421.75 is: 117,632.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,553.45 : 167,330.52 = 78,421.75 : x
  2. Step 2: Convert to fraction form
    111,553.45/167,330.52 = 78,421.75/x
  3. Step 3: Cross multiply
    111,553.45x = 167,330.52 × 78,421.75
  4. Step 4: Simplify right side
    111,553.45x = 13,122,352,206.81
  5. Step 5: Solve for x
    x = 13,122,352,206.81/111,553.45
  6. Step 6: Final answer
    x = 117,632.87

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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.