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Finding the Fourth Proportional to 139,283.10, 192,210.67 and 75,620.90

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Solution

The fourth proportional to 139,283.10, 192,210.67 and 75,620.90 is: 104,356.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,283.10 : 192,210.67 = 75,620.90 : x
  2. Step 2: Convert to fraction form
    139,283.10/192,210.67 = 75,620.90/x
  3. Step 3: Cross multiply
    139,283.10x = 192,210.67 × 75,620.90
  4. Step 4: Simplify right side
    139,283.10x = 14,535,143,185.42
  5. Step 5: Solve for x
    x = 14,535,143,185.42/139,283.10
  6. Step 6: Final answer
    x = 104,356.84

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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.