Home / 128,815.91-177,769.46-72,226.07

Finding the Fourth Proportional to 128,815.91, 177,769.46 and 72,226.07

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Solution

The fourth proportional to 128,815.91, 177,769.46 and 72,226.07 is: 99,673.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,815.91 : 177,769.46 = 72,226.07 : x
  2. Step 2: Convert to fraction form
    128,815.91/177,769.46 = 72,226.07/x
  3. Step 3: Cross multiply
    128,815.91x = 177,769.46 × 72,226.07
  4. Step 4: Simplify right side
    128,815.91x = 12,839,589,461.82
  5. Step 5: Solve for x
    x = 12,839,589,461.82/128,815.91
  6. Step 6: Final answer
    x = 99,673.94

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1.5x scale

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.