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Finding the Fourth Proportional to 245,692.45, 339,054.42 and 138,264.28

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Solution

The fourth proportional to 245,692.45, 339,054.42 and 138,264.28 is: 190,804.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,692.45 : 339,054.42 = 138,264.28 : x
  2. Step 2: Convert to fraction form
    245,692.45/339,054.42 = 138,264.28/x
  3. Step 3: Cross multiply
    245,692.45x = 339,054.42 × 138,264.28
  4. Step 4: Simplify right side
    245,692.45x = 46,879,115,262.12
  5. Step 5: Solve for x
    x = 46,879,115,262.12/245,692.45
  6. Step 6: Final answer
    x = 190,804.05

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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.