Home / 100,238.72-150,321.02-85,240.76

Finding the Fourth Proportional to 100,238.72, 150,321.02 and 85,240.76

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Solution

The fourth proportional to 100,238.72, 150,321.02 and 85,240.76 is: 127,829.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,238.72 : 150,321.02 = 85,240.76 : x
  2. Step 2: Convert to fraction form
    100,238.72/150,321.02 = 85,240.76/x
  3. Step 3: Cross multiply
    100,238.72x = 150,321.02 × 85,240.76
  4. Step 4: Simplify right side
    100,238.72x = 12,813,476,810.97
  5. Step 5: Solve for x
    x = 12,813,476,810.97/100,238.72
  6. Step 6: Final answer
    x = 127,829.62

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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.