Home / 209,979.75-315,001.35-67,777.50

Finding the Fourth Proportional to 209,979.75, 315,001.35 and 67,777.50

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Solution

The fourth proportional to 209,979.75, 315,001.35 and 67,777.50 is: 101,676.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,979.75 : 315,001.35 = 67,777.50 : x
  2. Step 2: Convert to fraction form
    209,979.75/315,001.35 = 67,777.50/x
  3. Step 3: Cross multiply
    209,979.75x = 315,001.35 × 67,777.50
  4. Step 4: Simplify right side
    209,979.75x = 21,350,003,999.63
  5. Step 5: Solve for x
    x = 21,350,003,999.63/209,979.75
  6. Step 6: Final answer
    x = 101,676.49

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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.