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Finding the Fourth Proportional to 84,369.98, 126,511.83 and 28,189.82

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Solution

The fourth proportional to 84,369.98, 126,511.83 and 28,189.82 is: 42,270.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,369.98 : 126,511.83 = 28,189.82 : x
  2. Step 2: Convert to fraction form
    84,369.98/126,511.83 = 28,189.82/x
  3. Step 3: Cross multiply
    84,369.98x = 126,511.83 × 28,189.82
  4. Step 4: Simplify right side
    84,369.98x = 3,566,345,715.57
  5. Step 5: Solve for x
    x = 3,566,345,715.57/84,369.98
  6. Step 6: Final answer
    x = 42,270.32

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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.