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Finding the Fourth Proportional to 42,907.88, 64,375.26 and 19,235.27

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Solution

The fourth proportional to 42,907.88, 64,375.26 and 19,235.27 is: 28,858.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,907.88 : 64,375.26 = 19,235.27 : x
  2. Step 2: Convert to fraction form
    42,907.88/64,375.26 = 19,235.27/x
  3. Step 3: Cross multiply
    42,907.88x = 64,375.26 × 19,235.27
  4. Step 4: Simplify right side
    42,907.88x = 1,238,275,596.23
  5. Step 5: Solve for x
    x = 1,238,275,596.23/42,907.88
  6. Step 6: Final answer
    x = 28,858.93

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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.