Home / 209,197.18-313,619.45-90,779.33

Finding the Fourth Proportional to 209,197.18, 313,619.45 and 90,779.33

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Solution

The fourth proportional to 209,197.18, 313,619.45 and 90,779.33 is: 136,092.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,197.18 : 313,619.45 = 90,779.33 : x
  2. Step 2: Convert to fraction form
    209,197.18/313,619.45 = 90,779.33/x
  3. Step 3: Cross multiply
    209,197.18x = 313,619.45 × 90,779.33
  4. Step 4: Simplify right side
    209,197.18x = 28,470,163,876.12
  5. Step 5: Solve for x
    x = 28,470,163,876.12/209,197.18
  6. Step 6: Final answer
    x = 136,092.48

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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.