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Finding the Fourth Proportional to 86,168.43, 129,120.66 and 57,984.03

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Solution

The fourth proportional to 86,168.43, 129,120.66 and 57,984.03 is: 86,887.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,168.43 : 129,120.66 = 57,984.03 : x
  2. Step 2: Convert to fraction form
    86,168.43/129,120.66 = 57,984.03/x
  3. Step 3: Cross multiply
    86,168.43x = 129,120.66 × 57,984.03
  4. Step 4: Simplify right side
    86,168.43x = 7,486,936,223.06
  5. Step 5: Solve for x
    x = 7,486,936,223.06/86,168.43
  6. Step 6: Final answer
    x = 86,887.23

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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.