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Finding the Fourth Proportional to 115,238.26, 159,028.78 and 64,939.06

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Solution

The fourth proportional to 115,238.26, 159,028.78 and 64,939.06 is: 89,615.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,238.26 : 159,028.78 = 64,939.06 : x
  2. Step 2: Convert to fraction form
    115,238.26/159,028.78 = 64,939.06/x
  3. Step 3: Cross multiply
    115,238.26x = 159,028.78 × 64,939.06
  4. Step 4: Simplify right side
    115,238.26x = 10,327,179,486.15
  5. Step 5: Solve for x
    x = 10,327,179,486.15/115,238.26
  6. Step 6: Final answer
    x = 89,615.89

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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.