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Finding the Fourth Proportional to 261,300.37, 391,989.51 and 92,806.54

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Solution

The fourth proportional to 261,300.37, 391,989.51 and 92,806.54 is: 139,223.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,300.37 : 391,989.51 = 92,806.54 : x
  2. Step 2: Convert to fraction form
    261,300.37/391,989.51 = 92,806.54/x
  3. Step 3: Cross multiply
    261,300.37x = 391,989.51 × 92,806.54
  4. Step 4: Simplify right side
    261,300.37x = 36,379,189,675.36
  5. Step 5: Solve for x
    x = 36,379,189,675.36/261,300.37
  6. Step 6: Final answer
    x = 139,223.64

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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.