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Finding the Fourth Proportional to 72,889.80, 109,334.26 and 18,854.48

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Solution

The fourth proportional to 72,889.80, 109,334.26 and 18,854.48 is: 28,281.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,889.80 : 109,334.26 = 18,854.48 : x
  2. Step 2: Convert to fraction form
    72,889.80/109,334.26 = 18,854.48/x
  3. Step 3: Cross multiply
    72,889.80x = 109,334.26 × 18,854.48
  4. Step 4: Simplify right side
    72,889.80x = 2,061,440,524.21
  5. Step 5: Solve for x
    x = 2,061,440,524.21/72,889.80
  6. Step 6: Final answer
    x = 28,281.60

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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.