Home / 45,415.20-68,122.80-28,721.10

Finding the Fourth Proportional to 45,415.20, 68,122.80 and 28,721.10

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Solution

The fourth proportional to 45,415.20, 68,122.80 and 28,721.10 is: 43,081.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,415.20 : 68,122.80 = 28,721.10 : x
  2. Step 2: Convert to fraction form
    45,415.20/68,122.80 = 28,721.10/x
  3. Step 3: Cross multiply
    45,415.20x = 68,122.80 × 28,721.10
  4. Step 4: Simplify right side
    45,415.20x = 1,956,561,751.08
  5. Step 5: Solve for x
    x = 1,956,561,751.08/45,415.20
  6. Step 6: Final answer
    x = 43,081.65

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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.