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Finding the Fourth Proportional to 111,963.63, 154,516.32 and 84,318.81

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Solution

The fourth proportional to 111,963.63, 154,516.32 and 84,318.81 is: 116,364.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,963.63 : 154,516.32 = 84,318.81 : x
  2. Step 2: Convert to fraction form
    111,963.63/154,516.32 = 84,318.81/x
  3. Step 3: Cross multiply
    111,963.63x = 154,516.32 × 84,318.81
  4. Step 4: Simplify right side
    111,963.63x = 13,028,632,227.98
  5. Step 5: Solve for x
    x = 13,028,632,227.98/111,963.63
  6. Step 6: Final answer
    x = 116,364.86

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1.5x scale

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.