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Finding the Fourth Proportional to 72,177, 99,604.26 and 40,345.22

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Solution

The fourth proportional to 72,177, 99,604.26 and 40,345.22 is: 55,676.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,177 : 99,604.26 = 40,345.22 : x
  2. Step 2: Convert to fraction form
    72,177/99,604.26 = 40,345.22/x
  3. Step 3: Cross multiply
    72,177x = 99,604.26 × 40,345.22
  4. Step 4: Simplify right side
    72,177x = 4,018,555,284.62
  5. Step 5: Solve for x
    x = 4,018,555,284.62/72,177
  6. Step 6: Final answer
    x = 55,676.40

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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.