Home / 139,545.81-192,567.40-79,120.53

Finding the Fourth Proportional to 139,545.81, 192,567.40 and 79,120.53

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Solution

The fourth proportional to 139,545.81, 192,567.40 and 79,120.53 is: 109,183.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,545.81 : 192,567.40 = 79,120.53 : x
  2. Step 2: Convert to fraction form
    139,545.81/192,567.40 = 79,120.53/x
  3. Step 3: Cross multiply
    139,545.81x = 192,567.40 × 79,120.53
  4. Step 4: Simplify right side
    139,545.81x = 15,236,035,585.84
  5. Step 5: Solve for x
    x = 15,236,035,585.84/139,545.81
  6. Step 6: Final answer
    x = 109,183.04

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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.