Home / 128,429.70-177,402.39-98,583.81

Finding the Fourth Proportional to 128,429.70, 177,402.39 and 98,583.81

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Solution

The fourth proportional to 128,429.70, 177,402.39 and 98,583.81 is: 136,175.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,429.70 : 177,402.39 = 98,583.81 : x
  2. Step 2: Convert to fraction form
    128,429.70/177,402.39 = 98,583.81/x
  3. Step 3: Cross multiply
    128,429.70x = 177,402.39 × 98,583.81
  4. Step 4: Simplify right side
    128,429.70x = 17,489,003,509.31
  5. Step 5: Solve for x
    x = 17,489,003,509.31/128,429.70
  6. Step 6: Final answer
    x = 136,175.69

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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.