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Finding the Fourth Proportional to 209,420.58, 314,129.43 and 84,759.78

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Solution

The fourth proportional to 209,420.58, 314,129.43 and 84,759.78 is: 127,139.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,420.58 : 314,129.43 = 84,759.78 : x
  2. Step 2: Convert to fraction form
    209,420.58/314,129.43 = 84,759.78/x
  3. Step 3: Cross multiply
    209,420.58x = 314,129.43 × 84,759.78
  4. Step 4: Simplify right side
    209,420.58x = 26,625,541,378.33
  5. Step 5: Solve for x
    x = 26,625,541,378.33/209,420.58
  6. Step 6: Final answer
    x = 127,139.09

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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.