Home / 106,521.45-159,629.86-78,219.46

Finding the Fourth Proportional to 106,521.45, 159,629.86 and 78,219.46

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Solution

The fourth proportional to 106,521.45, 159,629.86 and 78,219.46 is: 117,217.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    106,521.45 : 159,629.86 = 78,219.46 : x
  2. Step 2: Convert to fraction form
    106,521.45/159,629.86 = 78,219.46/x
  3. Step 3: Cross multiply
    106,521.45x = 159,629.86 × 78,219.46
  4. Step 4: Simplify right side
    106,521.45x = 12,486,161,449.08
  5. Step 5: Solve for x
    x = 12,486,161,449.08/106,521.45
  6. Step 6: Final answer
    x = 117,217.34

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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.