Home / 85,992.21-128,938.50-33,340.05

Finding the Fourth Proportional to 85,992.21, 128,938.50 and 33,340.05

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Solution

The fourth proportional to 85,992.21, 128,938.50 and 33,340.05 is: 49,990.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,992.21 : 128,938.50 = 33,340.05 : x
  2. Step 2: Convert to fraction form
    85,992.21/128,938.50 = 33,340.05/x
  3. Step 3: Cross multiply
    85,992.21x = 128,938.50 × 33,340.05
  4. Step 4: Simplify right side
    85,992.21x = 4,298,816,036.93
  5. Step 5: Solve for x
    x = 4,298,816,036.93/85,992.21
  6. Step 6: Final answer
    x = 49,990.76

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.