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Finding the Fourth Proportional to 154,659.43, 213,419.91 and 90,984.93

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Solution

The fourth proportional to 154,659.43, 213,419.91 and 90,984.93 is: 125,553.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,659.43 : 213,419.91 = 90,984.93 : x
  2. Step 2: Convert to fraction form
    154,659.43/213,419.91 = 90,984.93/x
  3. Step 3: Cross multiply
    154,659.43x = 213,419.91 × 90,984.93
  4. Step 4: Simplify right side
    154,659.43x = 19,417,995,571.96
  5. Step 5: Solve for x
    x = 19,417,995,571.96/154,659.43
  6. Step 6: Final answer
    x = 125,553.26

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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.