Home / 72,768.45-100,420.31-40,937.37

Finding the Fourth Proportional to 72,768.45, 100,420.31 and 40,937.37

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Solution

The fourth proportional to 72,768.45, 100,420.31 and 40,937.37 is: 56,493.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,768.45 : 100,420.31 = 40,937.37 : x
  2. Step 2: Convert to fraction form
    72,768.45/100,420.31 = 40,937.37/x
  3. Step 3: Cross multiply
    72,768.45x = 100,420.31 × 40,937.37
  4. Step 4: Simplify right side
    72,768.45x = 4,110,943,181.30
  5. Step 5: Solve for x
    x = 4,110,943,181.30/72,768.45
  6. Step 6: Final answer
    x = 56,493.48

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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.