Home / 208,629.96-312,969.42-66,425.40

Finding the Fourth Proportional to 208,629.96, 312,969.42 and 66,425.40

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Solution

The fourth proportional to 208,629.96, 312,969.42 and 66,425.40 is: 99,645.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,629.96 : 312,969.42 = 66,425.40 : x
  2. Step 2: Convert to fraction form
    208,629.96/312,969.42 = 66,425.40/x
  3. Step 3: Cross multiply
    208,629.96x = 312,969.42 × 66,425.40
  4. Step 4: Simplify right side
    208,629.96x = 20,789,118,911.27
  5. Step 5: Solve for x
    x = 20,789,118,911.27/208,629.96
  6. Step 6: Final answer
    x = 99,645.89

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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.