Home / 190,436.07-285,406.71-77,988.75

Finding the Fourth Proportional to 190,436.07, 285,406.71 and 77,988.75

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Solution

The fourth proportional to 190,436.07, 285,406.71 and 77,988.75 is: 116,881.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    190,436.07 : 285,406.71 = 77,988.75 : x
  2. Step 2: Convert to fraction form
    190,436.07/285,406.71 = 77,988.75/x
  3. Step 3: Cross multiply
    190,436.07x = 285,406.71 × 77,988.75
  4. Step 4: Simplify right side
    190,436.07x = 22,258,512,554.51
  5. Step 5: Solve for x
    x = 22,258,512,554.51/190,436.07
  6. Step 6: Final answer
    x = 116,881.81

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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.