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Finding the Fourth Proportional to 79,128.80, 118,711.20 and 23,723.36

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Solution

The fourth proportional to 79,128.80, 118,711.20 and 23,723.36 is: 35,590.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,128.80 : 118,711.20 = 23,723.36 : x
  2. Step 2: Convert to fraction form
    79,128.80/118,711.20 = 23,723.36/x
  3. Step 3: Cross multiply
    79,128.80x = 118,711.20 × 23,723.36
  4. Step 4: Simplify right side
    79,128.80x = 2,816,228,533.63
  5. Step 5: Solve for x
    x = 2,816,228,533.63/79,128.80
  6. Step 6: Final answer
    x = 35,590.44

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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.