Home / 139,579.64-192,638.58-79,172.18

Finding the Fourth Proportional to 139,579.64, 192,638.58 and 79,172.18

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Solution

The fourth proportional to 139,579.64, 192,638.58 and 79,172.18 is: 109,268.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,579.64 : 192,638.58 = 79,172.18 : x
  2. Step 2: Convert to fraction form
    139,579.64/192,638.58 = 79,172.18/x
  3. Step 3: Cross multiply
    139,579.64x = 192,638.58 × 79,172.18
  4. Step 4: Simplify right side
    139,579.64x = 15,251,616,330.70
  5. Step 5: Solve for x
    x = 15,251,616,330.70/139,579.64
  6. Step 6: Final answer
    x = 109,268.20

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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.