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Finding the Fourth Proportional to 139,625.64, 192,684.20 and 75,963.89

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Solution

The fourth proportional to 139,625.64, 192,684.20 and 75,963.89 is: 104,830.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,625.64 : 192,684.20 = 75,963.89 : x
  2. Step 2: Convert to fraction form
    139,625.64/192,684.20 = 75,963.89/x
  3. Step 3: Cross multiply
    139,625.64x = 192,684.20 × 75,963.89
  4. Step 4: Simplify right side
    139,625.64x = 14,637,040,030.30
  5. Step 5: Solve for x
    x = 14,637,040,030.30/139,625.64
  6. Step 6: Final answer
    x = 104,830.60

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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.