Home / 217,579.37-326,363.88-128,188.98

Finding the Fourth Proportional to 217,579.37, 326,363.88 and 128,188.98

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Solution

The fourth proportional to 217,579.37, 326,363.88 and 128,188.98 is: 192,280.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,579.37 : 326,363.88 = 128,188.98 : x
  2. Step 2: Convert to fraction form
    217,579.37/326,363.88 = 128,188.98/x
  3. Step 3: Cross multiply
    217,579.37x = 326,363.88 × 128,188.98
  4. Step 4: Simplify right side
    217,579.37x = 41,836,252,886.04
  5. Step 5: Solve for x
    x = 41,836,252,886.04/217,579.37
  6. Step 6: Final answer
    x = 192,280.42

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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.