Home / 205,282.55-307,890.34-72,131.72

Finding the Fourth Proportional to 205,282.55, 307,890.34 and 72,131.72

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Solution

The fourth proportional to 205,282.55, 307,890.34 and 72,131.72 is: 108,185.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    205,282.55 : 307,890.34 = 72,131.72 : x
  2. Step 2: Convert to fraction form
    205,282.55/307,890.34 = 72,131.72/x
  3. Step 3: Cross multiply
    205,282.55x = 307,890.34 × 72,131.72
  4. Step 4: Simplify right side
    205,282.55x = 22,208,658,075.80
  5. Step 5: Solve for x
    x = 22,208,658,075.80/205,282.55
  6. Step 6: Final answer
    x = 108,185.80

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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.