Home / 272,290.42-408,435.81-85,316.50

Finding the Fourth Proportional to 272,290.42, 408,435.81 and 85,316.50

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Solution

The fourth proportional to 272,290.42, 408,435.81 and 85,316.50 is: 127,974.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    272,290.42 : 408,435.81 = 85,316.50 : x
  2. Step 2: Convert to fraction form
    272,290.42/408,435.81 = 85,316.50/x
  3. Step 3: Cross multiply
    272,290.42x = 408,435.81 × 85,316.50
  4. Step 4: Simplify right side
    272,290.42x = 34,846,313,783.87
  5. Step 5: Solve for x
    x = 34,846,313,783.87/272,290.42
  6. Step 6: Final answer
    x = 127,974.81

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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.