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Finding the Fourth Proportional to 259,259.55, 388,889.33 and 81,780.41

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Solution

The fourth proportional to 259,259.55, 388,889.33 and 81,780.41 is: 122,670.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,259.55 : 388,889.33 = 81,780.41 : x
  2. Step 2: Convert to fraction form
    259,259.55/388,889.33 = 81,780.41/x
  3. Step 3: Cross multiply
    259,259.55x = 388,889.33 × 81,780.41
  4. Step 4: Simplify right side
    259,259.55x = 31,803,526,498.68
  5. Step 5: Solve for x
    x = 31,803,526,498.68/259,259.55
  6. Step 6: Final answer
    x = 122,670.61

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Similar ratio
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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.