Home / 74,162.72-102,344.64-40,171.28

Finding the Fourth Proportional to 74,162.72, 102,344.64 and 40,171.28

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Solution

The fourth proportional to 74,162.72, 102,344.64 and 40,171.28 is: 55,436.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,162.72 : 102,344.64 = 40,171.28 : x
  2. Step 2: Convert to fraction form
    74,162.72/102,344.64 = 40,171.28/x
  3. Step 3: Cross multiply
    74,162.72x = 102,344.64 × 40,171.28
  4. Step 4: Simplify right side
    74,162.72x = 4,111,315,189.94
  5. Step 5: Solve for x
    x = 4,111,315,189.94/74,162.72
  6. Step 6: Final answer
    x = 55,436.41

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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.