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Finding the Fourth Proportional to 79,310.81, 118,969.46 and 20,148.01

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Solution

The fourth proportional to 79,310.81, 118,969.46 and 20,148.01 is: 30,222.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,310.81 : 118,969.46 = 20,148.01 : x
  2. Step 2: Convert to fraction form
    79,310.81/118,969.46 = 20,148.01/x
  3. Step 3: Cross multiply
    79,310.81x = 118,969.46 × 20,148.01
  4. Step 4: Simplify right side
    79,310.81x = 2,396,997,547.17
  5. Step 5: Solve for x
    x = 2,396,997,547.17/79,310.81
  6. Step 6: Final answer
    x = 30,222.83

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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.