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Finding the Fourth Proportional to 139,318.62, 192,258.01 and 75,656.88

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Solution

The fourth proportional to 139,318.62, 192,258.01 and 75,656.88 is: 104,405.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,318.62 : 192,258.01 = 75,656.88 : x
  2. Step 2: Convert to fraction form
    139,318.62/192,258.01 = 75,656.88/x
  3. Step 3: Cross multiply
    139,318.62x = 192,258.01 × 75,656.88
  4. Step 4: Simplify right side
    139,318.62x = 14,545,639,852.03
  5. Step 5: Solve for x
    x = 14,545,639,852.03/139,318.62
  6. Step 6: Final answer
    x = 104,405.57

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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.