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Finding the Fourth Proportional to 245,699.88, 339,072.48 and 138,273.72

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Solution

The fourth proportional to 245,699.88, 339,072.48 and 138,273.72 is: 190,821.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,699.88 : 339,072.48 = 138,273.72 : x
  2. Step 2: Convert to fraction form
    245,699.88/339,072.48 = 138,273.72/x
  3. Step 3: Cross multiply
    245,699.88x = 339,072.48 × 138,273.72
  4. Step 4: Simplify right side
    245,699.88x = 46,884,813,159.23
  5. Step 5: Solve for x
    x = 46,884,813,159.23/245,699.88
  6. Step 6: Final answer
    x = 190,821.47

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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.