Home / 72,318.78-99,803.61-40,485.78

Finding the Fourth Proportional to 72,318.78, 99,803.61 and 40,485.78

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Solution

The fourth proportional to 72,318.78, 99,803.61 and 40,485.78 is: 55,872.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,318.78 : 99,803.61 = 40,485.78 : x
  2. Step 2: Convert to fraction form
    72,318.78/99,803.61 = 40,485.78/x
  3. Step 3: Cross multiply
    72,318.78x = 99,803.61 × 40,485.78
  4. Step 4: Simplify right side
    72,318.78x = 4,040,626,997.67
  5. Step 5: Solve for x
    x = 4,040,626,997.67/72,318.78
  6. Step 6: Final answer
    x = 55,872.44

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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.