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Finding the Fourth Proportional to 235,857.63, 325,483.31 and 128,428.43

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Solution

The fourth proportional to 235,857.63, 325,483.31 and 128,428.43 is: 177,231.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    235,857.63 : 325,483.31 = 128,428.43 : x
  2. Step 2: Convert to fraction form
    235,857.63/325,483.31 = 128,428.43/x
  3. Step 3: Cross multiply
    235,857.63x = 325,483.31 × 128,428.43
  4. Step 4: Simplify right side
    235,857.63x = 41,801,308,224.94
  5. Step 5: Solve for x
    x = 41,801,308,224.94/235,857.63
  6. Step 6: Final answer
    x = 177,231.10

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1.5x scale

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.