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Finding the Fourth Proportional to 84,620.02, 126,940.84 and 28,436.02

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Solution

The fourth proportional to 84,620.02, 126,940.84 and 28,436.02 is: 42,657.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,620.02 : 126,940.84 = 28,436.02 : x
  2. Step 2: Convert to fraction form
    84,620.02/126,940.84 = 28,436.02/x
  3. Step 3: Cross multiply
    84,620.02x = 126,940.84 × 28,436.02
  4. Step 4: Simplify right side
    84,620.02x = 3,609,692,265.06
  5. Step 5: Solve for x
    x = 3,609,692,265.06/84,620.02
  6. Step 6: Final answer
    x = 42,657.66

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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.