Home / 128,531.05-192,804.74-39,777.10

Finding the Fourth Proportional to 128,531.05, 192,804.74 and 39,777.10

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Solution

The fourth proportional to 128,531.05, 192,804.74 and 39,777.10 is: 59,668.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,531.05 : 192,804.74 = 39,777.10 : x
  2. Step 2: Convert to fraction form
    128,531.05/192,804.74 = 39,777.10/x
  3. Step 3: Cross multiply
    128,531.05x = 192,804.74 × 39,777.10
  4. Step 4: Simplify right side
    128,531.05x = 7,669,212,891.72
  5. Step 5: Solve for x
    x = 7,669,212,891.72/128,531.05
  6. Step 6: Final answer
    x = 59,668.17

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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.