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Finding the Fourth Proportional to 208,464.84, 312,694.18 and 66,318.72

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Solution

The fourth proportional to 208,464.84, 312,694.18 and 66,318.72 is: 99,477.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,464.84 : 312,694.18 = 66,318.72 : x
  2. Step 2: Convert to fraction form
    208,464.84/312,694.18 = 66,318.72/x
  3. Step 3: Cross multiply
    208,464.84x = 312,694.18 × 66,318.72
  4. Step 4: Simplify right side
    208,464.84x = 20,737,479,535.31
  5. Step 5: Solve for x
    x = 20,737,479,535.31/208,464.84
  6. Step 6: Final answer
    x = 99,477.11

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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.