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Finding the Fourth Proportional to 79,212.58, 118,817.71 and 20,047.84

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Solution

The fourth proportional to 79,212.58, 118,817.71 and 20,047.84 is: 30,071.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,212.58 : 118,817.71 = 20,047.84 : x
  2. Step 2: Convert to fraction form
    79,212.58/118,817.71 = 20,047.84/x
  3. Step 3: Cross multiply
    79,212.58x = 118,817.71 × 20,047.84
  4. Step 4: Simplify right side
    79,212.58x = 2,382,038,092.08
  5. Step 5: Solve for x
    x = 2,382,038,092.08/79,212.58
  6. Step 6: Final answer
    x = 30,071.46

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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.