Home / 72,782.12-100,438.92-40,951.28

Finding the Fourth Proportional to 72,782.12, 100,438.92 and 40,951.28

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Solution

The fourth proportional to 72,782.12, 100,438.92 and 40,951.28 is: 56,512.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,782.12 : 100,438.92 = 40,951.28 : x
  2. Step 2: Convert to fraction form
    72,782.12/100,438.92 = 40,951.28/x
  3. Step 3: Cross multiply
    72,782.12x = 100,438.92 × 40,951.28
  4. Step 4: Simplify right side
    72,782.12x = 4,113,102,335.82
  5. Step 5: Solve for x
    x = 4,113,102,335.82/72,782.12
  6. Step 6: Final answer
    x = 56,512.54

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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.