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Finding the Fourth Proportional to 245,399.56, 338,650.98 and 137,969.80

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Solution

The fourth proportional to 245,399.56, 338,650.98 and 137,969.80 is: 190,398.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,399.56 : 338,650.98 = 137,969.80 : x
  2. Step 2: Convert to fraction form
    245,399.56/338,650.98 = 137,969.80/x
  3. Step 3: Cross multiply
    245,399.56x = 338,650.98 × 137,969.80
  4. Step 4: Simplify right side
    245,399.56x = 46,723,607,980.40
  5. Step 5: Solve for x
    x = 46,723,607,980.40/245,399.56
  6. Step 6: Final answer
    x = 190,398.09

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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.