Home / 128,680.96-192,974-44,419.68

Finding the Fourth Proportional to 128,680.96, 192,974 and 44,419.68

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Solution

The fourth proportional to 128,680.96, 192,974 and 44,419.68 is: 66,613.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,680.96 : 192,974 = 44,419.68 : x
  2. Step 2: Convert to fraction form
    128,680.96/192,974 = 44,419.68/x
  3. Step 3: Cross multiply
    128,680.96x = 192,974 × 44,419.68
  4. Step 4: Simplify right side
    128,680.96x = 8,571,843,328.32
  5. Step 5: Solve for x
    x = 8,571,843,328.32/128,680.96
  6. Step 6: Final answer
    x = 66,613.14

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.