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Finding the Fourth Proportional to 151,907.51, 209,625.99 and 87,371.85

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Solution

The fourth proportional to 151,907.51, 209,625.99 and 87,371.85 is: 120,569.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    151,907.51 : 209,625.99 = 87,371.85 : x
  2. Step 2: Convert to fraction form
    151,907.51/209,625.99 = 87,371.85/x
  3. Step 3: Cross multiply
    151,907.51x = 209,625.99 × 87,371.85
  4. Step 4: Simplify right side
    151,907.51x = 18,315,410,554.38
  5. Step 5: Solve for x
    x = 18,315,410,554.38/151,907.51
  6. Step 6: Final answer
    x = 120,569.49

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.