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Finding the Fourth Proportional to 140,085.06, 210,129.02 and 40,245

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Solution

The fourth proportional to 140,085.06, 210,129.02 and 40,245 is: 60,367.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    140,085.06 : 210,129.02 = 40,245 : x
  2. Step 2: Convert to fraction form
    140,085.06/210,129.02 = 40,245/x
  3. Step 3: Cross multiply
    140,085.06x = 210,129.02 × 40,245
  4. Step 4: Simplify right side
    140,085.06x = 8,456,642,409.90
  5. Step 5: Solve for x
    x = 8,456,642,409.90/140,085.06
  6. Step 6: Final answer
    x = 60,367.91

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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.