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Finding the Fourth Proportional to 208,610.01, 312,811.45 and 66,436.74

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Solution

The fourth proportional to 208,610.01, 312,811.45 and 66,436.74 is: 99,622.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,610.01 : 312,811.45 = 66,436.74 : x
  2. Step 2: Convert to fraction form
    208,610.01/312,811.45 = 66,436.74/x
  3. Step 3: Cross multiply
    208,610.01x = 312,811.45 × 66,436.74
  4. Step 4: Simplify right side
    208,610.01x = 20,782,172,972.67
  5. Step 5: Solve for x
    x = 20,782,172,972.67/208,610.01
  6. Step 6: Final answer
    x = 99,622.13

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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.