Home / 128,749.10-192,598.36-103,817.30

Finding the Fourth Proportional to 128,749.10, 192,598.36 and 103,817.30

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Solution

The fourth proportional to 128,749.10, 192,598.36 and 103,817.30 is: 155,302.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,749.10 : 192,598.36 = 103,817.30 : x
  2. Step 2: Convert to fraction form
    128,749.10/192,598.36 = 103,817.30/x
  3. Step 3: Cross multiply
    128,749.10x = 192,598.36 × 103,817.30
  4. Step 4: Simplify right side
    128,749.10x = 19,995,040,497.09
  5. Step 5: Solve for x
    x = 19,995,040,497.09/128,749.10
  6. Step 6: Final answer
    x = 155,302.38

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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.