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Finding the Fourth Proportional to 139,321.46, 192,258.47 and 75,657.89

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Solution

The fourth proportional to 139,321.46, 192,258.47 and 75,657.89 is: 104,405.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,321.46 : 192,258.47 = 75,657.89 : x
  2. Step 2: Convert to fraction form
    139,321.46/192,258.47 = 75,657.89/x
  3. Step 3: Cross multiply
    139,321.46x = 192,258.47 × 75,657.89
  4. Step 4: Simplify right side
    139,321.46x = 14,545,868,835.25
  5. Step 5: Solve for x
    x = 14,545,868,835.25/139,321.46
  6. Step 6: Final answer
    x = 104,405.09

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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.