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Finding the Fourth Proportional to 83,984.70, 125,362.53 and 74,020.44

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Solution

The fourth proportional to 83,984.70, 125,362.53 and 74,020.44 is: 110,489.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,984.70 : 125,362.53 = 74,020.44 : x
  2. Step 2: Convert to fraction form
    83,984.70/125,362.53 = 74,020.44/x
  3. Step 3: Cross multiply
    83,984.70x = 125,362.53 × 74,020.44
  4. Step 4: Simplify right side
    83,984.70x = 9,279,389,630.11
  5. Step 5: Solve for x
    x = 9,279,389,630.11/83,984.70
  6. Step 6: Final answer
    x = 110,489.05

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.