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Finding the Fourth Proportional to 245,470, 368,209.48 and 76,986.56

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Solution

The fourth proportional to 245,470, 368,209.48 and 76,986.56 is: 115,481.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,470 : 368,209.48 = 76,986.56 : x
  2. Step 2: Convert to fraction form
    245,470/368,209.48 = 76,986.56/x
  3. Step 3: Cross multiply
    245,470x = 368,209.48 × 76,986.56
  4. Step 4: Simplify right side
    245,470x = 28,347,181,224.59
  5. Step 5: Solve for x
    x = 28,347,181,224.59/245,470
  6. Step 6: Final answer
    x = 115,481.25

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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.