Home / 139,134.08-192,005.06-78,703.44

Finding the Fourth Proportional to 139,134.08, 192,005.06 and 78,703.44

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Solution

The fourth proportional to 139,134.08, 192,005.06 and 78,703.44 is: 108,610.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,134.08 : 192,005.06 = 78,703.44 : x
  2. Step 2: Convert to fraction form
    139,134.08/192,005.06 = 78,703.44/x
  3. Step 3: Cross multiply
    139,134.08x = 192,005.06 × 78,703.44
  4. Step 4: Simplify right side
    139,134.08x = 15,111,458,719.41
  5. Step 5: Solve for x
    x = 15,111,458,719.41/139,134.08
  6. Step 6: Final answer
    x = 108,610.76

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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.