Home / 135,142.31-186,480.19-74,704.77

Finding the Fourth Proportional to 135,142.31, 186,480.19 and 74,704.77

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Solution

The fourth proportional to 135,142.31, 186,480.19 and 74,704.77 is: 103,083.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,142.31 : 186,480.19 = 74,704.77 : x
  2. Step 2: Convert to fraction form
    135,142.31/186,480.19 = 74,704.77/x
  3. Step 3: Cross multiply
    135,142.31x = 186,480.19 × 74,704.77
  4. Step 4: Simplify right side
    135,142.31x = 13,930,959,703.51
  5. Step 5: Solve for x
    x = 13,930,959,703.51/135,142.31
  6. Step 6: Final answer
    x = 103,083.63

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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.