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Finding the Fourth Proportional to 208,434.01, 312,618.35 and 66,260.65

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Solution

The fourth proportional to 208,434.01, 312,618.35 and 66,260.65 is: 99,380.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,434.01 : 312,618.35 = 66,260.65 : x
  2. Step 2: Convert to fraction form
    208,434.01/312,618.35 = 66,260.65/x
  3. Step 3: Cross multiply
    208,434.01x = 312,618.35 × 66,260.65
  4. Step 4: Simplify right side
    208,434.01x = 20,714,294,741.62
  5. Step 5: Solve for x
    x = 20,714,294,741.62/208,434.01
  6. Step 6: Final answer
    x = 99,380.59

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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.