Home / 72,278.64-99,745.92-40,447.08

Finding the Fourth Proportional to 72,278.64, 99,745.92 and 40,447.08

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Solution

The fourth proportional to 72,278.64, 99,745.92 and 40,447.08 is: 55,817.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,278.64 : 99,745.92 = 40,447.08 : x
  2. Step 2: Convert to fraction form
    72,278.64/99,745.92 = 40,447.08/x
  3. Step 3: Cross multiply
    72,278.64x = 99,745.92 × 40,447.08
  4. Step 4: Simplify right side
    72,278.64x = 4,034,431,205.91
  5. Step 5: Solve for x
    x = 4,034,431,205.91/72,278.64
  6. Step 6: Final answer
    x = 55,817.75

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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.