Home / 78,172.43-116,959.75-43,136.69

Finding the Fourth Proportional to 78,172.43, 116,959.75 and 43,136.69

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Solution

The fourth proportional to 78,172.43, 116,959.75 and 43,136.69 is: 64,540.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,172.43 : 116,959.75 = 43,136.69 : x
  2. Step 2: Convert to fraction form
    78,172.43/116,959.75 = 43,136.69/x
  3. Step 3: Cross multiply
    78,172.43x = 116,959.75 × 43,136.69
  4. Step 4: Simplify right side
    78,172.43x = 5,045,255,785.59
  5. Step 5: Solve for x
    x = 5,045,255,785.59/78,172.43
  6. Step 6: Final answer
    x = 64,540.10

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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.