Home / 128,310.10-192,100.65-121,327.90

Finding the Fourth Proportional to 128,310.10, 192,100.65 and 121,327.90

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Solution

The fourth proportional to 128,310.10, 192,100.65 and 121,327.90 is: 181,647.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,310.10 : 192,100.65 = 121,327.90 : x
  2. Step 2: Convert to fraction form
    128,310.10/192,100.65 = 121,327.90/x
  3. Step 3: Cross multiply
    128,310.10x = 192,100.65 × 121,327.90
  4. Step 4: Simplify right side
    128,310.10x = 23,307,168,453.14
  5. Step 5: Solve for x
    x = 23,307,168,453.14/128,310.10
  6. Step 6: Final answer
    x = 181,647.18

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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.