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Finding the Fourth Proportional to 209,628.45, 314,460.90 and 67,488.03

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Solution

The fourth proportional to 209,628.45, 314,460.90 and 67,488.03 is: 101,237.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,628.45 : 314,460.90 = 67,488.03 : x
  2. Step 2: Convert to fraction form
    209,628.45/314,460.90 = 67,488.03/x
  3. Step 3: Cross multiply
    209,628.45x = 314,460.90 × 67,488.03
  4. Step 4: Simplify right side
    209,628.45x = 21,222,346,653.03
  5. Step 5: Solve for x
    x = 21,222,346,653.03/209,628.45
  6. Step 6: Final answer
    x = 101,237.91

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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.