Home / 128,564.16-177,359.61-83,256.75

Finding the Fourth Proportional to 128,564.16, 177,359.61 and 83,256.75

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Solution

The fourth proportional to 128,564.16, 177,359.61 and 83,256.75 is: 114,856.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,564.16 : 177,359.61 = 83,256.75 : x
  2. Step 2: Convert to fraction form
    128,564.16/177,359.61 = 83,256.75/x
  3. Step 3: Cross multiply
    128,564.16x = 177,359.61 × 83,256.75
  4. Step 4: Simplify right side
    128,564.16x = 14,766,384,709.87
  5. Step 5: Solve for x
    x = 14,766,384,709.87/128,564.16
  6. Step 6: Final answer
    x = 114,856.15

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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.