Home / 128,172.38-192,252.76-39,422.03

Finding the Fourth Proportional to 128,172.38, 192,252.76 and 39,422.03

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Solution

The fourth proportional to 128,172.38, 192,252.76 and 39,422.03 is: 59,131.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,172.38 : 192,252.76 = 39,422.03 : x
  2. Step 2: Convert to fraction form
    128,172.38/192,252.76 = 39,422.03/x
  3. Step 3: Cross multiply
    128,172.38x = 192,252.76 × 39,422.03
  4. Step 4: Simplify right side
    128,172.38x = 7,578,993,012.48
  5. Step 5: Solve for x
    x = 7,578,993,012.48/128,172.38
  6. Step 6: Final answer
    x = 59,131.25

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1.5x scale

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.