Home / 128,898.12-177,992.40-80,582.64

Finding the Fourth Proportional to 128,898.12, 177,992.40 and 80,582.64

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Solution

The fourth proportional to 128,898.12, 177,992.40 and 80,582.64 is: 111,274.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,898.12 : 177,992.40 = 80,582.64 : x
  2. Step 2: Convert to fraction form
    128,898.12/177,992.40 = 80,582.64/x
  3. Step 3: Cross multiply
    128,898.12x = 177,992.40 × 80,582.64
  4. Step 4: Simplify right side
    128,898.12x = 14,343,097,491.94
  5. Step 5: Solve for x
    x = 14,343,097,491.94/128,898.12
  6. Step 6: Final answer
    x = 111,274.68

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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.