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Finding the Fourth Proportional to 73,803.15, 110,721.06 and 21,208.50

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Solution

The fourth proportional to 73,803.15, 110,721.06 and 21,208.50 is: 31,817.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,803.15 : 110,721.06 = 21,208.50 : x
  2. Step 2: Convert to fraction form
    73,803.15/110,721.06 = 21,208.50/x
  3. Step 3: Cross multiply
    73,803.15x = 110,721.06 × 21,208.50
  4. Step 4: Simplify right side
    73,803.15x = 2,348,227,601.01
  5. Step 5: Solve for x
    x = 2,348,227,601.01/73,803.15
  6. Step 6: Final answer
    x = 31,817.44

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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.