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Finding the Fourth Proportional to 84,485.04, 126,609.12 and 65,679

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Solution

The fourth proportional to 84,485.04, 126,609.12 and 65,679 is: 98,426.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,485.04 : 126,609.12 = 65,679 : x
  2. Step 2: Convert to fraction form
    84,485.04/126,609.12 = 65,679/x
  3. Step 3: Cross multiply
    84,485.04x = 126,609.12 × 65,679
  4. Step 4: Simplify right side
    84,485.04x = 8,315,560,392.48
  5. Step 5: Solve for x
    x = 8,315,560,392.48/84,485.04
  6. Step 6: Final answer
    x = 98,426.42

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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.