Home / 128,769.28-177,603.96-112,826

Finding the Fourth Proportional to 128,769.28, 177,603.96 and 112,826

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Solution

The fourth proportional to 128,769.28, 177,603.96 and 112,826 is: 155,614.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,769.28 : 177,603.96 = 112,826 : x
  2. Step 2: Convert to fraction form
    128,769.28/177,603.96 = 112,826/x
  3. Step 3: Cross multiply
    128,769.28x = 177,603.96 × 112,826
  4. Step 4: Simplify right side
    128,769.28x = 20,038,344,390.96
  5. Step 5: Solve for x
    x = 20,038,344,390.96/128,769.28
  6. Step 6: Final answer
    x = 155,614.32

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.