Home / 258,868.08-388,143.54-100,912

Finding the Fourth Proportional to 258,868.08, 388,143.54 and 100,912

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Solution

The fourth proportional to 258,868.08, 388,143.54 and 100,912 is: 151,306.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,868.08 : 388,143.54 = 100,912 : x
  2. Step 2: Convert to fraction form
    258,868.08/388,143.54 = 100,912/x
  3. Step 3: Cross multiply
    258,868.08x = 388,143.54 × 100,912
  4. Step 4: Simplify right side
    258,868.08x = 39,168,340,908.48
  5. Step 5: Solve for x
    x = 39,168,340,908.48/258,868.08
  6. Step 6: Final answer
    x = 151,306.18

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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.