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Finding the Fourth Proportional to 79,321.44, 118,898.16 and 28,686.56

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Solution

The fourth proportional to 79,321.44, 118,898.16 and 28,686.56 is: 42,999.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,321.44 : 118,898.16 = 28,686.56 : x
  2. Step 2: Convert to fraction form
    79,321.44/118,898.16 = 28,686.56/x
  3. Step 3: Cross multiply
    79,321.44x = 118,898.16 × 28,686.56
  4. Step 4: Simplify right side
    79,321.44x = 3,410,779,200.73
  5. Step 5: Solve for x
    x = 3,410,779,200.73/79,321.44
  6. Step 6: Final answer
    x = 42,999.46

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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.