Home / 138,434.54-191,039.79-74,772.33

Finding the Fourth Proportional to 138,434.54, 191,039.79 and 74,772.33

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Solution

The fourth proportional to 138,434.54, 191,039.79 and 74,772.33 is: 103,185.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,434.54 : 191,039.79 = 74,772.33 : x
  2. Step 2: Convert to fraction form
    138,434.54/191,039.79 = 74,772.33/x
  3. Step 3: Cross multiply
    138,434.54x = 191,039.79 × 74,772.33
  4. Step 4: Simplify right side
    138,434.54x = 14,284,490,933.99
  5. Step 5: Solve for x
    x = 14,284,490,933.99/138,434.54
  6. Step 6: Final answer
    x = 103,185.89

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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.