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Finding the Fourth Proportional to 72,391.21, 108,511.02 and 30,295.41

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Solution

The fourth proportional to 72,391.21, 108,511.02 and 30,295.41 is: 45,411.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,391.21 : 108,511.02 = 30,295.41 : x
  2. Step 2: Convert to fraction form
    72,391.21/108,511.02 = 30,295.41/x
  3. Step 3: Cross multiply
    72,391.21x = 108,511.02 × 30,295.41
  4. Step 4: Simplify right side
    72,391.21x = 3,287,385,840.42
  5. Step 5: Solve for x
    x = 3,287,385,840.42/72,391.21
  6. Step 6: Final answer
    x = 45,411.40

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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.