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Finding the Fourth Proportional to 245,707.60, 368,561.20 and 68,214.56

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Solution

The fourth proportional to 245,707.60, 368,561.20 and 68,214.56 is: 102,321.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,707.60 : 368,561.20 = 68,214.56 : x
  2. Step 2: Convert to fraction form
    245,707.60/368,561.20 = 68,214.56/x
  3. Step 3: Cross multiply
    245,707.60x = 368,561.20 × 68,214.56
  4. Step 4: Simplify right side
    245,707.60x = 25,141,240,091.07
  5. Step 5: Solve for x
    x = 25,141,240,091.07/245,707.60
  6. Step 6: Final answer
    x = 102,321.78

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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.