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Finding the Fourth Proportional to 245,889.66, 339,360.06 and 138,480.69

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Solution

The fourth proportional to 245,889.66, 339,360.06 and 138,480.69 is: 191,121.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,889.66 : 339,360.06 = 138,480.69 : x
  2. Step 2: Convert to fraction form
    245,889.66/339,360.06 = 138,480.69/x
  3. Step 3: Cross multiply
    245,889.66x = 339,360.06 × 138,480.69
  4. Step 4: Simplify right side
    245,889.66x = 46,994,815,267.24
  5. Step 5: Solve for x
    x = 46,994,815,267.24/245,889.66
  6. Step 6: Final answer
    x = 191,121.56

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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.