Home / 85,979.84-128,928.36-36,046.56

Finding the Fourth Proportional to 85,979.84, 128,928.36 and 36,046.56

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Solution

The fourth proportional to 85,979.84, 128,928.36 and 36,046.56 is: 54,052.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,979.84 : 128,928.36 = 36,046.56 : x
  2. Step 2: Convert to fraction form
    85,979.84/128,928.36 = 36,046.56/x
  3. Step 3: Cross multiply
    85,979.84x = 128,928.36 × 36,046.56
  4. Step 4: Simplify right side
    85,979.84x = 4,647,423,864.44
  5. Step 5: Solve for x
    x = 4,647,423,864.44/85,979.84
  6. Step 6: Final answer
    x = 54,052.48

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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.