Home / 128,845.50-177,826.23-78,573.66

Finding the Fourth Proportional to 128,845.50, 177,826.23 and 78,573.66

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Solution

The fourth proportional to 128,845.50, 177,826.23 and 78,573.66 is: 108,443.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,845.50 : 177,826.23 = 78,573.66 : x
  2. Step 2: Convert to fraction form
    128,845.50/177,826.23 = 78,573.66/x
  3. Step 3: Cross multiply
    128,845.50x = 177,826.23 × 78,573.66
  4. Step 4: Simplify right side
    128,845.50x = 13,972,457,735.10
  5. Step 5: Solve for x
    x = 13,972,457,735.10/128,845.50
  6. Step 6: Final answer
    x = 108,443.51

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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.