Home / 212,455.59-318,524.19-128,195.82

Finding the Fourth Proportional to 212,455.59, 318,524.19 and 128,195.82

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Solution

The fourth proportional to 212,455.59, 318,524.19 and 128,195.82 is: 192,197.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,455.59 : 318,524.19 = 128,195.82 : x
  2. Step 2: Convert to fraction form
    212,455.59/318,524.19 = 128,195.82/x
  3. Step 3: Cross multiply
    212,455.59x = 318,524.19 × 128,195.82
  4. Step 4: Simplify right side
    212,455.59x = 40,833,469,726.89
  5. Step 5: Solve for x
    x = 40,833,469,726.89/212,455.59
  6. Step 6: Final answer
    x = 192,197.67

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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.