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Finding the Fourth Proportional to 208,436.01, 312,621.34 and 66,262.65

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Solution

The fourth proportional to 208,436.01, 312,621.34 and 66,262.65 is: 99,383.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,436.01 : 312,621.34 = 66,262.65 : x
  2. Step 2: Convert to fraction form
    208,436.01/312,621.34 = 66,262.65/x
  3. Step 3: Cross multiply
    208,436.01x = 312,621.34 × 66,262.65
  4. Step 4: Simplify right side
    208,436.01x = 20,715,118,434.95
  5. Step 5: Solve for x
    x = 20,715,118,434.95/208,436.01
  6. Step 6: Final answer
    x = 99,383.59

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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.