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Finding the Fourth Proportional to 131,622, 181,639.08 and 72,006

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Solution

The fourth proportional to 131,622, 181,639.08 and 72,006 is: 99,368.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,622 : 181,639.08 = 72,006 : x
  2. Step 2: Convert to fraction form
    131,622/181,639.08 = 72,006/x
  3. Step 3: Cross multiply
    131,622x = 181,639.08 × 72,006
  4. Step 4: Simplify right side
    131,622x = 13,079,103,594.48
  5. Step 5: Solve for x
    x = 13,079,103,594.48/131,622
  6. Step 6: Final answer
    x = 99,368.67

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.