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Finding the Fourth Proportional to 70,529.92, 105,801.69 and 20,608.87

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Solution

The fourth proportional to 70,529.92, 105,801.69 and 20,608.87 is: 30,915.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,529.92 : 105,801.69 = 20,608.87 : x
  2. Step 2: Convert to fraction form
    70,529.92/105,801.69 = 20,608.87/x
  3. Step 3: Cross multiply
    70,529.92x = 105,801.69 × 20,608.87
  4. Step 4: Simplify right side
    70,529.92x = 2,180,453,274.99
  5. Step 5: Solve for x
    x = 2,180,453,274.99/70,529.92
  6. Step 6: Final answer
    x = 30,915.29

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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.