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Finding the Fourth Proportional to 81,970.70, 122,889.74 and 34,555.14

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Solution

The fourth proportional to 81,970.70, 122,889.74 and 34,555.14 is: 51,804.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,970.70 : 122,889.74 = 34,555.14 : x
  2. Step 2: Convert to fraction form
    81,970.70/122,889.74 = 34,555.14/x
  3. Step 3: Cross multiply
    81,970.70x = 122,889.74 × 34,555.14
  4. Step 4: Simplify right side
    81,970.70x = 4,246,471,997.49
  5. Step 5: Solve for x
    x = 4,246,471,997.49/81,970.70
  6. Step 6: Final answer
    x = 51,804.76

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.