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Finding the Fourth Proportional to 245,356.20, 368,269.20 and 127,112.40

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Solution

The fourth proportional to 245,356.20, 368,269.20 and 127,112.40 is: 190,790.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,356.20 : 368,269.20 = 127,112.40 : x
  2. Step 2: Convert to fraction form
    245,356.20/368,269.20 = 127,112.40/x
  3. Step 3: Cross multiply
    245,356.20x = 368,269.20 × 127,112.40
  4. Step 4: Simplify right side
    245,356.20x = 46,811,581,858.08
  5. Step 5: Solve for x
    x = 46,811,581,858.08/245,356.20
  6. Step 6: Final answer
    x = 190,790.30

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.