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Finding the Fourth Proportional to 83,670.40, 125,504.80 and 20,490.80

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Solution

The fourth proportional to 83,670.40, 125,504.80 and 20,490.80 is: 30,736.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,670.40 : 125,504.80 = 20,490.80 : x
  2. Step 2: Convert to fraction form
    83,670.40/125,504.80 = 20,490.80/x
  3. Step 3: Cross multiply
    83,670.40x = 125,504.80 × 20,490.80
  4. Step 4: Simplify right side
    83,670.40x = 2,571,693,755.84
  5. Step 5: Solve for x
    x = 2,571,693,755.84/83,670.40
  6. Step 6: Final answer
    x = 30,736.00

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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.