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Finding the Fourth Proportional to 67,431.80, 100,917.30 and 59,137.40

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Solution

The fourth proportional to 67,431.80, 100,917.30 and 59,137.40 is: 88,504.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,431.80 : 100,917.30 = 59,137.40 : x
  2. Step 2: Convert to fraction form
    67,431.80/100,917.30 = 59,137.40/x
  3. Step 3: Cross multiply
    67,431.80x = 100,917.30 × 59,137.40
  4. Step 4: Simplify right side
    67,431.80x = 5,967,986,737.02
  5. Step 5: Solve for x
    x = 5,967,986,737.02/67,431.80
  6. Step 6: Final answer
    x = 88,504.04

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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.