Home / 128,923.60-177,913.22-71,563.43

Finding the Fourth Proportional to 128,923.60, 177,913.22 and 71,563.43

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Solution

The fourth proportional to 128,923.60, 177,913.22 and 71,563.43 is: 98,756.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,923.60 : 177,913.22 = 71,563.43 : x
  2. Step 2: Convert to fraction form
    128,923.60/177,913.22 = 71,563.43/x
  3. Step 3: Cross multiply
    128,923.60x = 177,913.22 × 71,563.43
  4. Step 4: Simplify right side
    128,923.60x = 12,732,080,265.54
  5. Step 5: Solve for x
    x = 12,732,080,265.54/128,923.60
  6. Step 6: Final answer
    x = 98,756.79

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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.