Home / 128,722.96-193,156.92-100,564.08

Finding the Fourth Proportional to 128,722.96, 193,156.92 and 100,564.08

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Solution

The fourth proportional to 128,722.96, 193,156.92 and 100,564.08 is: 150,902.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,722.96 : 193,156.92 = 100,564.08 : x
  2. Step 2: Convert to fraction form
    128,722.96/193,156.92 = 100,564.08/x
  3. Step 3: Cross multiply
    128,722.96x = 193,156.92 × 100,564.08
  4. Step 4: Simplify right side
    128,722.96x = 19,424,647,955.43
  5. Step 5: Solve for x
    x = 19,424,647,955.43/128,722.96
  6. Step 6: Final answer
    x = 150,902.74

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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.