Home / 128,618.73-192,858.51-102,135.11

Finding the Fourth Proportional to 128,618.73, 192,858.51 and 102,135.11

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Solution

The fourth proportional to 128,618.73, 192,858.51 and 102,135.11 is: 153,147.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,618.73 : 192,858.51 = 102,135.11 : x
  2. Step 2: Convert to fraction form
    128,618.73/192,858.51 = 102,135.11/x
  3. Step 3: Cross multiply
    128,618.73x = 192,858.51 × 102,135.11
  4. Step 4: Simplify right side
    128,618.73x = 19,697,624,168.99
  5. Step 5: Solve for x
    x = 19,697,624,168.99/128,618.73
  6. Step 6: Final answer
    x = 153,147.40

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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.