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Finding the Fourth Proportional to 79,407.64, 118,855.50 and 43,813

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Solution

The fourth proportional to 79,407.64, 118,855.50 and 43,813 is: 65,578.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,407.64 : 118,855.50 = 43,813 : x
  2. Step 2: Convert to fraction form
    79,407.64/118,855.50 = 43,813/x
  3. Step 3: Cross multiply
    79,407.64x = 118,855.50 × 43,813
  4. Step 4: Simplify right side
    79,407.64x = 5,207,416,021.50
  5. Step 5: Solve for x
    x = 5,207,416,021.50/79,407.64
  6. Step 6: Final answer
    x = 65,578.27

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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.