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Finding the Fourth Proportional to 235,409.61, 353,111.31 and 57,918.15

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Solution

The fourth proportional to 235,409.61, 353,111.31 and 57,918.15 is: 86,876.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    235,409.61 : 353,111.31 = 57,918.15 : x
  2. Step 2: Convert to fraction form
    235,409.61/353,111.31 = 57,918.15/x
  3. Step 3: Cross multiply
    235,409.61x = 353,111.31 × 57,918.15
  4. Step 4: Simplify right side
    235,409.61x = 20,451,553,819.28
  5. Step 5: Solve for x
    x = 20,451,553,819.28/235,409.61
  6. Step 6: Final answer
    x = 86,876.46

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.