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Finding the Fourth Proportional to 245,980.96, 369,023.28 and 79,756

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Solution

The fourth proportional to 245,980.96, 369,023.28 and 79,756 is: 119,650.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,980.96 : 369,023.28 = 79,756 : x
  2. Step 2: Convert to fraction form
    245,980.96/369,023.28 = 79,756/x
  3. Step 3: Cross multiply
    245,980.96x = 369,023.28 × 79,756
  4. Step 4: Simplify right side
    245,980.96x = 29,431,820,719.68
  5. Step 5: Solve for x
    x = 29,431,820,719.68/245,980.96
  6. Step 6: Final answer
    x = 119,650.81

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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.