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Finding the Fourth Proportional to 67,243.80, 100,878.99 and 19,859.72

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Solution

The fourth proportional to 67,243.80, 100,878.99 and 19,859.72 is: 29,793.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,243.80 : 100,878.99 = 19,859.72 : x
  2. Step 2: Convert to fraction form
    67,243.80/100,878.99 = 19,859.72/x
  3. Step 3: Cross multiply
    67,243.80x = 100,878.99 × 19,859.72
  4. Step 4: Simplify right side
    67,243.80x = 2,003,427,916.41
  5. Step 5: Solve for x
    x = 2,003,427,916.41/67,243.80
  6. Step 6: Final answer
    x = 29,793.49

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1.5x scale

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.