Home / 74,481.86-102,785.40-40,490.61

Finding the Fourth Proportional to 74,481.86, 102,785.40 and 40,490.61

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Solution

The fourth proportional to 74,481.86, 102,785.40 and 40,490.61 is: 55,877.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,481.86 : 102,785.40 = 40,490.61 : x
  2. Step 2: Convert to fraction form
    74,481.86/102,785.40 = 40,490.61/x
  3. Step 3: Cross multiply
    74,481.86x = 102,785.40 × 40,490.61
  4. Step 4: Simplify right side
    74,481.86x = 4,161,843,545.09
  5. Step 5: Solve for x
    x = 4,161,843,545.09/74,481.86
  6. Step 6: Final answer
    x = 55,877.28

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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.