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Finding the Fourth Proportional to 73,812.70, 110,724.45 and 21,222.64

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Solution

The fourth proportional to 73,812.70, 110,724.45 and 21,222.64 is: 31,835.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,812.70 : 110,724.45 = 21,222.64 : x
  2. Step 2: Convert to fraction form
    73,812.70/110,724.45 = 21,222.64/x
  3. Step 3: Cross multiply
    73,812.70x = 110,724.45 × 21,222.64
  4. Step 4: Simplify right side
    73,812.70x = 2,349,865,141.55
  5. Step 5: Solve for x
    x = 2,349,865,141.55/73,812.70
  6. Step 6: Final answer
    x = 31,835.51

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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.