Home / 128,946.96-177,930.90-75,245.04

Finding the Fourth Proportional to 128,946.96, 177,930.90 and 75,245.04

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Solution

The fourth proportional to 128,946.96, 177,930.90 and 75,245.04 is: 103,828.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,946.96 : 177,930.90 = 75,245.04 : x
  2. Step 2: Convert to fraction form
    128,946.96/177,930.90 = 75,245.04/x
  3. Step 3: Cross multiply
    128,946.96x = 177,930.90 × 75,245.04
  4. Step 4: Simplify right side
    128,946.96x = 13,388,417,687.74
  5. Step 5: Solve for x
    x = 13,388,417,687.74/128,946.96
  6. Step 6: Final answer
    x = 103,828.87

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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.