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Finding the Fourth Proportional to 235,987.55, 325,662.37 and 128,557.56

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Solution

The fourth proportional to 235,987.55, 325,662.37 and 128,557.56 is: 177,409.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    235,987.55 : 325,662.37 = 128,557.56 : x
  2. Step 2: Convert to fraction form
    235,987.55/325,662.37 = 128,557.56/x
  3. Step 3: Cross multiply
    235,987.55x = 325,662.37 × 128,557.56
  4. Step 4: Simplify right side
    235,987.55x = 41,866,358,546.22
  5. Step 5: Solve for x
    x = 41,866,358,546.22/235,987.55
  6. Step 6: Final answer
    x = 177,409.18

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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.