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Finding the Fourth Proportional to 67,573.74, 101,353.41 and 20,821.50

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Solution

The fourth proportional to 67,573.74, 101,353.41 and 20,821.50 is: 31,230.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,573.74 : 101,353.41 = 20,821.50 : x
  2. Step 2: Convert to fraction form
    67,573.74/101,353.41 = 20,821.50/x
  3. Step 3: Cross multiply
    67,573.74x = 101,353.41 × 20,821.50
  4. Step 4: Simplify right side
    67,573.74x = 2,110,330,026.32
  5. Step 5: Solve for x
    x = 2,110,330,026.32/67,573.74
  6. Step 6: Final answer
    x = 31,230.03

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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.