Home / 129,581.60-178,556.16-99,365.36

Finding the Fourth Proportional to 129,581.60, 178,556.16 and 99,365.36

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Solution

The fourth proportional to 129,581.60, 178,556.16 and 99,365.36 is: 136,919.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,581.60 : 178,556.16 = 99,365.36 : x
  2. Step 2: Convert to fraction form
    129,581.60/178,556.16 = 99,365.36/x
  3. Step 3: Cross multiply
    129,581.60x = 178,556.16 × 99,365.36
  4. Step 4: Simplify right side
    129,581.60x = 17,742,297,118.62
  5. Step 5: Solve for x
    x = 17,742,297,118.62/129,581.60
  6. Step 6: Final answer
    x = 136,919.88

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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.