Home / 128,582.50-177,443.65-71,993.88

Finding the Fourth Proportional to 128,582.50, 177,443.65 and 71,993.88

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Solution

The fourth proportional to 128,582.50, 177,443.65 and 71,993.88 is: 99,351.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,582.50 : 177,443.65 = 71,993.88 : x
  2. Step 2: Convert to fraction form
    128,582.50/177,443.65 = 71,993.88/x
  3. Step 3: Cross multiply
    128,582.50x = 177,443.65 × 71,993.88
  4. Step 4: Simplify right side
    128,582.50x = 12,774,856,844.86
  5. Step 5: Solve for x
    x = 12,774,856,844.86/128,582.50
  6. Step 6: Final answer
    x = 99,351.44

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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.