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Finding the Fourth Proportional to 85,129.63, 117,422.60 and 53,243.17

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Solution

The fourth proportional to 85,129.63, 117,422.60 and 53,243.17 is: 73,440.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,129.63 : 117,422.60 = 53,243.17 : x
  2. Step 2: Convert to fraction form
    85,129.63/117,422.60 = 53,243.17/x
  3. Step 3: Cross multiply
    85,129.63x = 117,422.60 × 53,243.17
  4. Step 4: Simplify right side
    85,129.63x = 6,251,951,453.64
  5. Step 5: Solve for x
    x = 6,251,951,453.64/85,129.63
  6. Step 6: Final answer
    x = 73,440.37

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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.