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Finding the Fourth Proportional to 78,777, 108,716.58 and 45,245.16

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Solution

The fourth proportional to 78,777, 108,716.58 and 45,245.16 is: 62,440.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,777 : 108,716.58 = 45,245.16 : x
  2. Step 2: Convert to fraction form
    78,777/108,716.58 = 45,245.16/x
  3. Step 3: Cross multiply
    78,777x = 108,716.58 × 45,245.16
  4. Step 4: Simplify right side
    78,777x = 4,918,899,056.75
  5. Step 5: Solve for x
    x = 4,918,899,056.75/78,777
  6. Step 6: Final answer
    x = 62,440.80

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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.