Home / 72,640.34-100,238.28-40,814.54

Finding the Fourth Proportional to 72,640.34, 100,238.28 and 40,814.54

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Solution

The fourth proportional to 72,640.34, 100,238.28 and 40,814.54 is: 56,321.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,640.34 : 100,238.28 = 40,814.54 : x
  2. Step 2: Convert to fraction form
    72,640.34/100,238.28 = 40,814.54/x
  3. Step 3: Cross multiply
    72,640.34x = 100,238.28 × 40,814.54
  4. Step 4: Simplify right side
    72,640.34x = 4,091,179,288.59
  5. Step 5: Solve for x
    x = 4,091,179,288.59/72,640.34
  6. Step 6: Final answer
    x = 56,321.04

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.