Home / 72,557.82-100,128.96-40,725.90

Finding the Fourth Proportional to 72,557.82, 100,128.96 and 40,725.90

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Solution

The fourth proportional to 72,557.82, 100,128.96 and 40,725.90 is: 56,201.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,557.82 : 100,128.96 = 40,725.90 : x
  2. Step 2: Convert to fraction form
    72,557.82/100,128.96 = 40,725.90/x
  3. Step 3: Cross multiply
    72,557.82x = 100,128.96 × 40,725.90
  4. Step 4: Simplify right side
    72,557.82x = 4,077,842,012.06
  5. Step 5: Solve for x
    x = 4,077,842,012.06/72,557.82
  6. Step 6: Final answer
    x = 56,201.28

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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.