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Finding the Fourth Proportional to 245,359.78, 368,039.64 and 79,147.78

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Solution

The fourth proportional to 245,359.78, 368,039.64 and 79,147.78 is: 118,721.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,359.78 : 368,039.64 = 79,147.78 : x
  2. Step 2: Convert to fraction form
    245,359.78/368,039.64 = 79,147.78/x
  3. Step 3: Cross multiply
    245,359.78x = 368,039.64 × 79,147.78
  4. Step 4: Simplify right side
    245,359.78x = 29,129,520,458.00
  5. Step 5: Solve for x
    x = 29,129,520,458.00/245,359.78
  6. Step 6: Final answer
    x = 118,721.66

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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.