Home / 79,989.12-110,322-74,623.68

Finding the Fourth Proportional to 79,989.12, 110,322 and 74,623.68

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Solution

The fourth proportional to 79,989.12, 110,322 and 74,623.68 is: 102,921.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,989.12 : 110,322 = 74,623.68 : x
  2. Step 2: Convert to fraction form
    79,989.12/110,322 = 74,623.68/x
  3. Step 3: Cross multiply
    79,989.12x = 110,322 × 74,623.68
  4. Step 4: Simplify right side
    79,989.12x = 8,232,633,624.96
  5. Step 5: Solve for x
    x = 8,232,633,624.96/79,989.12
  6. Step 6: Final answer
    x = 102,921.92

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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.