Home / 139,953.54-193,128.90-79,516.20

Finding the Fourth Proportional to 139,953.54, 193,128.90 and 79,516.20

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Solution

The fourth proportional to 139,953.54, 193,128.90 and 79,516.20 is: 109,728.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,953.54 : 193,128.90 = 79,516.20 : x
  2. Step 2: Convert to fraction form
    139,953.54/193,128.90 = 79,516.20/x
  3. Step 3: Cross multiply
    139,953.54x = 193,128.90 × 79,516.20
  4. Step 4: Simplify right side
    139,953.54x = 15,356,876,238.18
  5. Step 5: Solve for x
    x = 15,356,876,238.18/139,953.54
  6. Step 6: Final answer
    x = 109,728.39

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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.