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Finding the Fourth Proportional to 71,855.80, 107,775.48 and 19,261.18

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Solution

The fourth proportional to 71,855.80, 107,775.48 and 19,261.18 is: 28,889.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,855.80 : 107,775.48 = 19,261.18 : x
  2. Step 2: Convert to fraction form
    71,855.80/107,775.48 = 19,261.18/x
  3. Step 3: Cross multiply
    71,855.80x = 107,775.48 × 19,261.18
  4. Step 4: Simplify right side
    71,855.80x = 2,075,882,919.87
  5. Step 5: Solve for x
    x = 2,075,882,919.87/71,855.80
  6. Step 6: Final answer
    x = 28,889.57

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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.