Home / 143,423.42-197,920.90-78,010.60

Finding the Fourth Proportional to 143,423.42, 197,920.90 and 78,010.60

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Solution

The fourth proportional to 143,423.42, 197,920.90 and 78,010.60 is: 107,652.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,423.42 : 197,920.90 = 78,010.60 : x
  2. Step 2: Convert to fraction form
    143,423.42/197,920.90 = 78,010.60/x
  3. Step 3: Cross multiply
    143,423.42x = 197,920.90 × 78,010.60
  4. Step 4: Simplify right side
    143,423.42x = 15,439,928,161.54
  5. Step 5: Solve for x
    x = 15,439,928,161.54/143,423.42
  6. Step 6: Final answer
    x = 107,652.77

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.