Home / 90,639.35-125,100.11-57,912.74

Finding the Fourth Proportional to 90,639.35, 125,100.11 and 57,912.74

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Solution

The fourth proportional to 90,639.35, 125,100.11 and 57,912.74 is: 79,930.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,639.35 : 125,100.11 = 57,912.74 : x
  2. Step 2: Convert to fraction form
    90,639.35/125,100.11 = 57,912.74/x
  3. Step 3: Cross multiply
    90,639.35x = 125,100.11 × 57,912.74
  4. Step 4: Simplify right side
    90,639.35x = 7,244,890,144.40
  5. Step 5: Solve for x
    x = 7,244,890,144.40/90,639.35
  6. Step 6: Final answer
    x = 79,930.96

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.