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Finding the Fourth Proportional to 86,711.76, 119,659.70 and 48,471.39

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Solution

The fourth proportional to 86,711.76, 119,659.70 and 48,471.39 is: 66,889.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,711.76 : 119,659.70 = 48,471.39 : x
  2. Step 2: Convert to fraction form
    86,711.76/119,659.70 = 48,471.39/x
  3. Step 3: Cross multiply
    86,711.76x = 119,659.70 × 48,471.39
  4. Step 4: Simplify right side
    86,711.76x = 5,800,072,107.16
  5. Step 5: Solve for x
    x = 5,800,072,107.16/86,711.76
  6. Step 6: Final answer
    x = 66,889.11

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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.