Home / 128,231.22-192,174.88-99,802.51

Finding the Fourth Proportional to 128,231.22, 192,174.88 and 99,802.51

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Solution

The fourth proportional to 128,231.22, 192,174.88 and 99,802.51 is: 149,569.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,231.22 : 192,174.88 = 99,802.51 : x
  2. Step 2: Convert to fraction form
    128,231.22/192,174.88 = 99,802.51/x
  3. Step 3: Cross multiply
    128,231.22x = 192,174.88 × 99,802.51
  4. Step 4: Simplify right side
    128,231.22x = 19,179,535,382.95
  5. Step 5: Solve for x
    x = 19,179,535,382.95/128,231.22
  6. Step 6: Final answer
    x = 149,569.94

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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.