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Finding the Fourth Proportional to 57,206.70, 78,976.67 and 39,084.67

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Solution

The fourth proportional to 57,206.70, 78,976.67 and 39,084.67 is: 53,958.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,206.70 : 78,976.67 = 39,084.67 : x
  2. Step 2: Convert to fraction form
    57,206.70/78,976.67 = 39,084.67/x
  3. Step 3: Cross multiply
    57,206.70x = 78,976.67 × 39,084.67
  4. Step 4: Simplify right side
    57,206.70x = 3,086,776,987.95
  5. Step 5: Solve for x
    x = 3,086,776,987.95/57,206.70
  6. Step 6: Final answer
    x = 53,958.31

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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.