Home / 74,120.19-102,285.37-40,128.43

Finding the Fourth Proportional to 74,120.19, 102,285.37 and 40,128.43

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Solution

The fourth proportional to 74,120.19, 102,285.37 and 40,128.43 is: 55,376.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,120.19 : 102,285.37 = 40,128.43 : x
  2. Step 2: Convert to fraction form
    74,120.19/102,285.37 = 40,128.43/x
  3. Step 3: Cross multiply
    74,120.19x = 102,285.37 × 40,128.43
  4. Step 4: Simplify right side
    74,120.19x = 4,104,551,310.07
  5. Step 5: Solve for x
    x = 4,104,551,310.07/74,120.19
  6. Step 6: Final answer
    x = 55,376.97

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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.