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Finding the Fourth Proportional to 113,640.96, 170,537.28 and 39,768.96

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Solution

The fourth proportional to 113,640.96, 170,537.28 and 39,768.96 is: 59,679.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,640.96 : 170,537.28 = 39,768.96 : x
  2. Step 2: Convert to fraction form
    113,640.96/170,537.28 = 39,768.96/x
  3. Step 3: Cross multiply
    113,640.96x = 170,537.28 × 39,768.96
  4. Step 4: Simplify right side
    113,640.96x = 6,782,090,266.83
  5. Step 5: Solve for x
    x = 6,782,090,266.83/113,640.96
  6. Step 6: Final answer
    x = 59,679.98

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.