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Finding the Fourth Proportional to 78,340.50, 108,108.37 and 44,355.43

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Solution

The fourth proportional to 78,340.50, 108,108.37 and 44,355.43 is: 61,209.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,340.50 : 108,108.37 = 44,355.43 : x
  2. Step 2: Convert to fraction form
    78,340.50/108,108.37 = 44,355.43/x
  3. Step 3: Cross multiply
    78,340.50x = 108,108.37 × 44,355.43
  4. Step 4: Simplify right side
    78,340.50x = 4,795,193,428.53
  5. Step 5: Solve for x
    x = 4,795,193,428.53/78,340.50
  6. Step 6: Final answer
    x = 61,209.64

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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.