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Finding the Fourth Proportional to 102,887.56, 141,936.86 and 66,600.72

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Solution

The fourth proportional to 102,887.56, 141,936.86 and 66,600.72 is: 91,877.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,887.56 : 141,936.86 = 66,600.72 : x
  2. Step 2: Convert to fraction form
    102,887.56/141,936.86 = 66,600.72/x
  3. Step 3: Cross multiply
    102,887.56x = 141,936.86 × 66,600.72
  4. Step 4: Simplify right side
    102,887.56x = 9,453,097,070.54
  5. Step 5: Solve for x
    x = 9,453,097,070.54/102,887.56
  6. Step 6: Final answer
    x = 91,877.94

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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.