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Finding the Fourth Proportional to 235,991.70, 325,669.14 and 128,562.51

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Solution

The fourth proportional to 235,991.70, 325,669.14 and 128,562.51 is: 177,416.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    235,991.70 : 325,669.14 = 128,562.51 : x
  2. Step 2: Convert to fraction form
    235,991.70/325,669.14 = 128,562.51/x
  3. Step 3: Cross multiply
    235,991.70x = 325,669.14 × 128,562.51
  4. Step 4: Simplify right side
    235,991.70x = 41,868,843,289.20
  5. Step 5: Solve for x
    x = 41,868,843,289.20/235,991.70
  6. Step 6: Final answer
    x = 177,416.59

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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.