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Finding the Fourth Proportional to 74,608.84, 102,499.65 and 66,755.08

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Solution

The fourth proportional to 74,608.84, 102,499.65 and 66,755.08 is: 91,709.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,608.84 : 102,499.65 = 66,755.08 : x
  2. Step 2: Convert to fraction form
    74,608.84/102,499.65 = 66,755.08/x
  3. Step 3: Cross multiply
    74,608.84x = 102,499.65 × 66,755.08
  4. Step 4: Simplify right side
    74,608.84x = 6,842,372,335.72
  5. Step 5: Solve for x
    x = 6,842,372,335.72/74,608.84
  6. Step 6: Final answer
    x = 91,709.94

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.