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Finding the Fourth Proportional to 100,124.10, 150,003.90 and 79,201.80

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Solution

The fourth proportional to 100,124.10, 150,003.90 and 79,201.80 is: 118,658.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,124.10 : 150,003.90 = 79,201.80 : x
  2. Step 2: Convert to fraction form
    100,124.10/150,003.90 = 79,201.80/x
  3. Step 3: Cross multiply
    100,124.10x = 150,003.90 × 79,201.80
  4. Step 4: Simplify right side
    100,124.10x = 11,880,578,887.02
  5. Step 5: Solve for x
    x = 11,880,578,887.02/100,124.10
  6. Step 6: Final answer
    x = 118,658.53

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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.