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Finding the Fourth Proportional to 213,611.70, 320,331.15 and 73,298.10

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Solution

The fourth proportional to 213,611.70, 320,331.15 and 73,298.10 is: 109,917.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    213,611.70 : 320,331.15 = 73,298.10 : x
  2. Step 2: Convert to fraction form
    213,611.70/320,331.15 = 73,298.10/x
  3. Step 3: Cross multiply
    213,611.70x = 320,331.15 × 73,298.10
  4. Step 4: Simplify right side
    213,611.70x = 23,479,664,665.82
  5. Step 5: Solve for x
    x = 23,479,664,665.82/213,611.70
  6. Step 6: Final answer
    x = 109,917.50

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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.