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Finding the Fourth Proportional to 159,638.50, 220,310.43 and 91,655.60

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Solution

The fourth proportional to 159,638.50, 220,310.43 and 91,655.60 is: 126,490.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,638.50 : 220,310.43 = 91,655.60 : x
  2. Step 2: Convert to fraction form
    159,638.50/220,310.43 = 91,655.60/x
  3. Step 3: Cross multiply
    159,638.50x = 220,310.43 × 91,655.60
  4. Step 4: Simplify right side
    159,638.50x = 20,192,684,647.91
  5. Step 5: Solve for x
    x = 20,192,684,647.91/159,638.50
  6. Step 6: Final answer
    x = 126,490.07

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.