Home / 45,686.45-68,521.29-20,720.50

Finding the Fourth Proportional to 45,686.45, 68,521.29 and 20,720.50

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Solution

The fourth proportional to 45,686.45, 68,521.29 and 20,720.50 is: 31,076.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,686.45 : 68,521.29 = 20,720.50 : x
  2. Step 2: Convert to fraction form
    45,686.45/68,521.29 = 20,720.50/x
  3. Step 3: Cross multiply
    45,686.45x = 68,521.29 × 20,720.50
  4. Step 4: Simplify right side
    45,686.45x = 1,419,795,389.45
  5. Step 5: Solve for x
    x = 1,419,795,389.45/45,686.45
  6. Step 6: Final answer
    x = 31,076.95

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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.