Home / 208,541.65-312,856.21-90,229.81

Finding the Fourth Proportional to 208,541.65, 312,856.21 and 90,229.81

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Solution

The fourth proportional to 208,541.65, 312,856.21 and 90,229.81 is: 135,363.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,541.65 : 312,856.21 = 90,229.81 : x
  2. Step 2: Convert to fraction form
    208,541.65/312,856.21 = 90,229.81/x
  3. Step 3: Cross multiply
    208,541.65x = 312,856.21 × 90,229.81
  4. Step 4: Simplify right side
    208,541.65x = 28,228,954,821.34
  5. Step 5: Solve for x
    x = 28,228,954,821.34/208,541.65
  6. Step 6: Final answer
    x = 135,363.63

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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.