Home / 72,557.12-100,128.12-40,725.38

Finding the Fourth Proportional to 72,557.12, 100,128.12 and 40,725.38

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Solution

The fourth proportional to 72,557.12, 100,128.12 and 40,725.38 is: 56,200.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,557.12 : 100,128.12 = 40,725.38 : x
  2. Step 2: Convert to fraction form
    72,557.12/100,128.12 = 40,725.38/x
  3. Step 3: Cross multiply
    72,557.12x = 100,128.12 × 40,725.38
  4. Step 4: Simplify right side
    72,557.12x = 4,077,755,735.69
  5. Step 5: Solve for x
    x = 4,077,755,735.69/72,557.12
  6. Step 6: Final answer
    x = 56,200.63

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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.