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Finding the Fourth Proportional to 139,672, 192,747.36 and 80,056

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Solution

The fourth proportional to 139,672, 192,747.36 and 80,056 is: 110,477.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,672 : 192,747.36 = 80,056 : x
  2. Step 2: Convert to fraction form
    139,672/192,747.36 = 80,056/x
  3. Step 3: Cross multiply
    139,672x = 192,747.36 × 80,056
  4. Step 4: Simplify right side
    139,672x = 15,430,582,652.16
  5. Step 5: Solve for x
    x = 15,430,582,652.16/139,672
  6. Step 6: Final answer
    x = 110,477.28

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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.