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Finding the Fourth Proportional to 245,705.07, 339,016.89 and 138,235.89

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Solution

The fourth proportional to 245,705.07, 339,016.89 and 138,235.89 is: 190,733.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,705.07 : 339,016.89 = 138,235.89 : x
  2. Step 2: Convert to fraction form
    245,705.07/339,016.89 = 138,235.89/x
  3. Step 3: Cross multiply
    245,705.07x = 339,016.89 × 138,235.89
  4. Step 4: Simplify right side
    245,705.07x = 46,864,300,054.64
  5. Step 5: Solve for x
    x = 46,864,300,054.64/245,705.07
  6. Step 6: Final answer
    x = 190,733.96

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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.