Home / 128,231.48-192,175.24-99,802.76

Finding the Fourth Proportional to 128,231.48, 192,175.24 and 99,802.76

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Solution

The fourth proportional to 128,231.48, 192,175.24 and 99,802.76 is: 149,570.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,231.48 : 192,175.24 = 99,802.76 : x
  2. Step 2: Convert to fraction form
    128,231.48/192,175.24 = 99,802.76/x
  3. Step 3: Cross multiply
    128,231.48x = 192,175.24 × 99,802.76
  4. Step 4: Simplify right side
    128,231.48x = 19,179,619,355.66
  5. Step 5: Solve for x
    x = 19,179,619,355.66/128,231.48
  6. Step 6: Final answer
    x = 149,570.29

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.