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Finding the Fourth Proportional to 115,238, 159,028.44 and 64,938.80

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Solution

The fourth proportional to 115,238, 159,028.44 and 64,938.80 is: 89,615.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,238 : 159,028.44 = 64,938.80 : x
  2. Step 2: Convert to fraction form
    115,238/159,028.44 = 64,938.80/x
  3. Step 3: Cross multiply
    115,238x = 159,028.44 × 64,938.80
  4. Step 4: Simplify right side
    115,238x = 10,327,116,059.47
  5. Step 5: Solve for x
    x = 10,327,116,059.47/115,238
  6. Step 6: Final answer
    x = 89,615.54

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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.