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Finding the Fourth Proportional to 137,908.75, 206,477.72 and 74,501.71

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Solution

The fourth proportional to 137,908.75, 206,477.72 and 74,501.71 is: 111,544.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,908.75 : 206,477.72 = 74,501.71 : x
  2. Step 2: Convert to fraction form
    137,908.75/206,477.72 = 74,501.71/x
  3. Step 3: Cross multiply
    137,908.75x = 206,477.72 × 74,501.71
  4. Step 4: Simplify right side
    137,908.75x = 15,382,943,216.90
  5. Step 5: Solve for x
    x = 15,382,943,216.90/137,908.75
  6. Step 6: Final answer
    x = 111,544.36

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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.