Home / 105,137.92-145,161.12-80,895.76

Finding the Fourth Proportional to 105,137.92, 145,161.12 and 80,895.76

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Solution

The fourth proportional to 105,137.92, 145,161.12 and 80,895.76 is: 111,690.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,137.92 : 145,161.12 = 80,895.76 : x
  2. Step 2: Convert to fraction form
    105,137.92/145,161.12 = 80,895.76/x
  3. Step 3: Cross multiply
    105,137.92x = 145,161.12 × 80,895.76
  4. Step 4: Simplify right side
    105,137.92x = 11,742,919,124.85
  5. Step 5: Solve for x
    x = 11,742,919,124.85/105,137.92
  6. Step 6: Final answer
    x = 111,690.62

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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.