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Finding the Fourth Proportional to 78,803.61, 118,205.42 and 33,815.21

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Solution

The fourth proportional to 78,803.61, 118,205.42 and 33,815.21 is: 50,722.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,803.61 : 118,205.42 = 33,815.21 : x
  2. Step 2: Convert to fraction form
    78,803.61/118,205.42 = 33,815.21/x
  3. Step 3: Cross multiply
    78,803.61x = 118,205.42 × 33,815.21
  4. Step 4: Simplify right side
    78,803.61x = 3,997,140,340.34
  5. Step 5: Solve for x
    x = 3,997,140,340.34/78,803.61
  6. Step 6: Final answer
    x = 50,722.81

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.