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Finding the Fourth Proportional to 85,466.81, 127,874.90 and 51,608.21

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Solution

The fourth proportional to 85,466.81, 127,874.90 and 51,608.21 is: 77,215.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,466.81 : 127,874.90 = 51,608.21 : x
  2. Step 2: Convert to fraction form
    85,466.81/127,874.90 = 51,608.21/x
  3. Step 3: Cross multiply
    85,466.81x = 127,874.90 × 51,608.21
  4. Step 4: Simplify right side
    85,466.81x = 6,599,394,182.58
  5. Step 5: Solve for x
    x = 6,599,394,182.58/85,466.81
  6. Step 6: Final answer
    x = 77,215.87

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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.