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Finding the Fourth Proportional to 67,980.20, 101,984.90 and 28,514.57

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Solution

The fourth proportional to 67,980.20, 101,984.90 and 28,514.57 is: 42,777.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,980.20 : 101,984.90 = 28,514.57 : x
  2. Step 2: Convert to fraction form
    67,980.20/101,984.90 = 28,514.57/x
  3. Step 3: Cross multiply
    67,980.20x = 101,984.90 × 28,514.57
  4. Step 4: Simplify right side
    67,980.20x = 2,908,054,917.50
  5. Step 5: Solve for x
    x = 2,908,054,917.50/67,980.20
  6. Step 6: Final answer
    x = 42,777.97

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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.