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Finding the Fourth Proportional to 84,125, 126,066.98 and 39,728.90

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Solution

The fourth proportional to 84,125, 126,066.98 and 39,728.90 is: 59,536.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,125 : 126,066.98 = 39,728.90 : x
  2. Step 2: Convert to fraction form
    84,125/126,066.98 = 39,728.90/x
  3. Step 3: Cross multiply
    84,125x = 126,066.98 × 39,728.90
  4. Step 4: Simplify right side
    84,125x = 5,008,502,441.72
  5. Step 5: Solve for x
    x = 5,008,502,441.72/84,125
  6. Step 6: Final answer
    x = 59,536.43

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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.