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Finding the Fourth Proportional to 86,378.70, 119,200.41 and 48,138.42

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Solution

The fourth proportional to 86,378.70, 119,200.41 and 48,138.42 is: 66,429.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,378.70 : 119,200.41 = 48,138.42 : x
  2. Step 2: Convert to fraction form
    86,378.70/119,200.41 = 48,138.42/x
  3. Step 3: Cross multiply
    86,378.70x = 119,200.41 × 48,138.42
  4. Step 4: Simplify right side
    86,378.70x = 5,738,119,400.75
  5. Step 5: Solve for x
    x = 5,738,119,400.75/86,378.70
  6. Step 6: Final answer
    x = 66,429.80

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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.