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Finding the Fourth Proportional to 139,283.85, 192,211.70 and 75,621.65

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Solution

The fourth proportional to 139,283.85, 192,211.70 and 75,621.65 is: 104,357.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,283.85 : 192,211.70 = 75,621.65 : x
  2. Step 2: Convert to fraction form
    139,283.85/192,211.70 = 75,621.65/x
  3. Step 3: Cross multiply
    139,283.85x = 192,211.70 × 75,621.65
  4. Step 4: Simplify right side
    139,283.85x = 14,535,365,903.31
  5. Step 5: Solve for x
    x = 14,535,365,903.31/139,283.85
  6. Step 6: Final answer
    x = 104,357.87

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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.