Home / 209,208.47-313,636.32-90,790.61

Finding the Fourth Proportional to 209,208.47, 313,636.32 and 90,790.61

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Solution

The fourth proportional to 209,208.47, 313,636.32 and 90,790.61 is: 136,109.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,208.47 : 313,636.32 = 90,790.61 : x
  2. Step 2: Convert to fraction form
    209,208.47/313,636.32 = 90,790.61/x
  3. Step 3: Cross multiply
    209,208.47x = 313,636.32 × 90,790.61
  4. Step 4: Simplify right side
    209,208.47x = 28,475,231,242.77
  5. Step 5: Solve for x
    x = 28,475,231,242.77/209,208.47
  6. Step 6: Final answer
    x = 136,109.36

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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.