Home / 85,072.21-127,687.25-42,981.85

Finding the Fourth Proportional to 85,072.21, 127,687.25 and 42,981.85

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Solution

The fourth proportional to 85,072.21, 127,687.25 and 42,981.85 is: 64,512.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,072.21 : 127,687.25 = 42,981.85 : x
  2. Step 2: Convert to fraction form
    85,072.21/127,687.25 = 42,981.85/x
  3. Step 3: Cross multiply
    85,072.21x = 127,687.25 × 42,981.85
  4. Step 4: Simplify right side
    85,072.21x = 5,488,234,493.48
  5. Step 5: Solve for x
    x = 5,488,234,493.48/85,072.21
  6. Step 6: Final answer
    x = 64,512.66

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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.