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Finding the Fourth Proportional to 139,670.28, 192,745.16 and 76,008.04

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Solution

The fourth proportional to 139,670.28, 192,745.16 and 76,008.04 is: 104,891.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,670.28 : 192,745.16 = 76,008.04 : x
  2. Step 2: Convert to fraction form
    139,670.28/192,745.16 = 76,008.04/x
  3. Step 3: Cross multiply
    139,670.28x = 192,745.16 × 76,008.04
  4. Step 4: Simplify right side
    139,670.28x = 14,650,181,831.09
  5. Step 5: Solve for x
    x = 14,650,181,831.09/139,670.28
  6. Step 6: Final answer
    x = 104,891.19

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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.