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Finding the Fourth Proportional to 78,093.62, 107,688.64 and 66,800.49

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Solution

The fourth proportional to 78,093.62, 107,688.64 and 66,800.49 is: 92,115.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,093.62 : 107,688.64 = 66,800.49 : x
  2. Step 2: Convert to fraction form
    78,093.62/107,688.64 = 66,800.49/x
  3. Step 3: Cross multiply
    78,093.62x = 107,688.64 × 66,800.49
  4. Step 4: Simplify right side
    78,093.62x = 7,193,654,156.26
  5. Step 5: Solve for x
    x = 7,193,654,156.26/78,093.62
  6. Step 6: Final answer
    x = 92,115.78

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1.5x scale

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.