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Finding the Fourth Proportional to 72,934.03, 109,391.32 and 20,339.11

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Solution

The fourth proportional to 72,934.03, 109,391.32 and 20,339.11 is: 30,505.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,934.03 : 109,391.32 = 20,339.11 : x
  2. Step 2: Convert to fraction form
    72,934.03/109,391.32 = 20,339.11/x
  3. Step 3: Cross multiply
    72,934.03x = 109,391.32 × 20,339.11
  4. Step 4: Simplify right side
    72,934.03x = 2,224,921,492.72
  5. Step 5: Solve for x
    x = 2,224,921,492.72/72,934.03
  6. Step 6: Final answer
    x = 30,505.95

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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.