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Finding the Fourth Proportional to 78,388.50, 108,193.68 and 48,199.98

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Solution

The fourth proportional to 78,388.50, 108,193.68 and 48,199.98 is: 66,526.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,388.50 : 108,193.68 = 48,199.98 : x
  2. Step 2: Convert to fraction form
    78,388.50/108,193.68 = 48,199.98/x
  3. Step 3: Cross multiply
    78,388.50x = 108,193.68 × 48,199.98
  4. Step 4: Simplify right side
    78,388.50x = 5,214,933,212.13
  5. Step 5: Solve for x
    x = 5,214,933,212.13/78,388.50
  6. Step 6: Final answer
    x = 66,526.76

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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.