Home / 45,138.20-67,718.10-21,745.40

Finding the Fourth Proportional to 45,138.20, 67,718.10 and 21,745.40

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Solution

The fourth proportional to 45,138.20, 67,718.10 and 21,745.40 is: 32,623.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,138.20 : 67,718.10 = 21,745.40 : x
  2. Step 2: Convert to fraction form
    45,138.20/67,718.10 = 21,745.40/x
  3. Step 3: Cross multiply
    45,138.20x = 67,718.10 × 21,745.40
  4. Step 4: Simplify right side
    45,138.20x = 1,472,557,171.74
  5. Step 5: Solve for x
    x = 1,472,557,171.74/45,138.20
  6. Step 6: Final answer
    x = 32,623.30

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1.5x scale

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.