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Finding the Fourth Proportional to 67,219.20, 100,828.80 and 63,938.70

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Solution

The fourth proportional to 67,219.20, 100,828.80 and 63,938.70 is: 95,908.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,219.20 : 100,828.80 = 63,938.70 : x
  2. Step 2: Convert to fraction form
    67,219.20/100,828.80 = 63,938.70/x
  3. Step 3: Cross multiply
    67,219.20x = 100,828.80 × 63,938.70
  4. Step 4: Simplify right side
    67,219.20x = 6,446,862,394.56
  5. Step 5: Solve for x
    x = 6,446,862,394.56/67,219.20
  6. Step 6: Final answer
    x = 95,908.05

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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.