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Finding the Fourth Proportional to 79,356.34, 119,043.57 and 28,779.22

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Solution

The fourth proportional to 79,356.34, 119,043.57 and 28,779.22 is: 43,172.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,356.34 : 119,043.57 = 28,779.22 : x
  2. Step 2: Convert to fraction form
    79,356.34/119,043.57 = 28,779.22/x
  3. Step 3: Cross multiply
    79,356.34x = 119,043.57 × 28,779.22
  4. Step 4: Simplify right side
    79,356.34x = 3,425,981,090.62
  5. Step 5: Solve for x
    x = 3,425,981,090.62/79,356.34
  6. Step 6: Final answer
    x = 43,172.12

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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.