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Finding the Fourth Proportional to 209,239.88, 313,859.96 and 68,998.50

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Solution

The fourth proportional to 209,239.88, 313,859.96 and 68,998.50 is: 103,497.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,239.88 : 313,859.96 = 68,998.50 : x
  2. Step 2: Convert to fraction form
    209,239.88/313,859.96 = 68,998.50/x
  3. Step 3: Cross multiply
    209,239.88x = 313,859.96 × 68,998.50
  4. Step 4: Simplify right side
    209,239.88x = 21,655,866,751.93
  5. Step 5: Solve for x
    x = 21,655,866,751.93/209,239.88
  6. Step 6: Final answer
    x = 103,497.80

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1.5x scale

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.