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Finding the Fourth Proportional to 100,302.51, 150,512.09 and 79,112.91

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Solution

The fourth proportional to 100,302.51, 150,512.09 and 79,112.91 is: 118,715.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,302.51 : 150,512.09 = 79,112.91 : x
  2. Step 2: Convert to fraction form
    100,302.51/150,512.09 = 79,112.91/x
  3. Step 3: Cross multiply
    100,302.51x = 150,512.09 × 79,112.91
  4. Step 4: Simplify right side
    100,302.51x = 11,907,449,034.52
  5. Step 5: Solve for x
    x = 11,907,449,034.52/100,302.51
  6. Step 6: Final answer
    x = 118,715.36

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1.5x scale

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.