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Finding the Fourth Proportional to 50,879.50, 70,211.26 and 28,216.70

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Solution

The fourth proportional to 50,879.50, 70,211.26 and 28,216.70 is: 38,937.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    50,879.50 : 70,211.26 = 28,216.70 : x
  2. Step 2: Convert to fraction form
    50,879.50/70,211.26 = 28,216.70/x
  3. Step 3: Cross multiply
    50,879.50x = 70,211.26 × 28,216.70
  4. Step 4: Simplify right side
    50,879.50x = 1,981,130,060.04
  5. Step 5: Solve for x
    x = 1,981,130,060.04/50,879.50
  6. Step 6: Final answer
    x = 38,937.69

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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.