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Finding the Fourth Proportional to 67,856.96, 101,800.20 and 21,113.60

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Solution

The fourth proportional to 67,856.96, 101,800.20 and 21,113.60 is: 31,674.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,856.96 : 101,800.20 = 21,113.60 : x
  2. Step 2: Convert to fraction form
    67,856.96/101,800.20 = 21,113.60/x
  3. Step 3: Cross multiply
    67,856.96x = 101,800.20 × 21,113.60
  4. Step 4: Simplify right side
    67,856.96x = 2,149,368,702.72
  5. Step 5: Solve for x
    x = 2,149,368,702.72/67,856.96
  6. Step 6: Final answer
    x = 31,674.99

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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.