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Finding the Fourth Proportional to 138,661.87, 207,976.74 and 38,830.06

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Solution

The fourth proportional to 138,661.87, 207,976.74 and 38,830.06 is: 58,240.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,661.87 : 207,976.74 = 38,830.06 : x
  2. Step 2: Convert to fraction form
    138,661.87/207,976.74 = 38,830.06/x
  3. Step 3: Cross multiply
    138,661.87x = 207,976.74 × 38,830.06
  4. Step 4: Simplify right side
    138,661.87x = 8,075,749,292.80
  5. Step 5: Solve for x
    x = 8,075,749,292.80/138,661.87
  6. Step 6: Final answer
    x = 58,240.59

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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.