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Finding the Fourth Proportional to 79,278, 118,819.80 and 47,668.56

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Solution

The fourth proportional to 79,278, 118,819.80 and 47,668.56 is: 71,444.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,278 : 118,819.80 = 47,668.56 : x
  2. Step 2: Convert to fraction form
    79,278/118,819.80 = 47,668.56/x
  3. Step 3: Cross multiply
    79,278x = 118,819.80 × 47,668.56
  4. Step 4: Simplify right side
    79,278x = 5,663,968,765.49
  5. Step 5: Solve for x
    x = 5,663,968,765.49/79,278
  6. Step 6: Final answer
    x = 71,444.40

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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.