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Finding the Fourth Proportional to 258,895.80, 388,343.70 and 71,907.30

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Solution

The fourth proportional to 258,895.80, 388,343.70 and 71,907.30 is: 107,860.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,895.80 : 388,343.70 = 71,907.30 : x
  2. Step 2: Convert to fraction form
    258,895.80/388,343.70 = 71,907.30/x
  3. Step 3: Cross multiply
    258,895.80x = 388,343.70 × 71,907.30
  4. Step 4: Simplify right side
    258,895.80x = 27,924,746,939.01
  5. Step 5: Solve for x
    x = 27,924,746,939.01/258,895.80
  6. Step 6: Final answer
    x = 107,860.95

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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.