Home / 143,389.79-215,113.42-80,299.65

Finding the Fourth Proportional to 143,389.79, 215,113.42 and 80,299.65

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Solution

The fourth proportional to 143,389.79, 215,113.42 and 80,299.65 is: 120,465.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,389.79 : 215,113.42 = 80,299.65 : x
  2. Step 2: Convert to fraction form
    143,389.79/215,113.42 = 80,299.65/x
  3. Step 3: Cross multiply
    143,389.79x = 215,113.42 × 80,299.65
  4. Step 4: Simplify right side
    143,389.79x = 17,273,533,243.35
  5. Step 5: Solve for x
    x = 17,273,533,243.35/143,389.79
  6. Step 6: Final answer
    x = 120,465.57

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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.