Home / 135,309.20-186,681.48-78,708.56

Finding the Fourth Proportional to 135,309.20, 186,681.48 and 78,708.56

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Solution

The fourth proportional to 135,309.20, 186,681.48 and 78,708.56 is: 108,591.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,309.20 : 186,681.48 = 78,708.56 : x
  2. Step 2: Convert to fraction form
    135,309.20/186,681.48 = 78,708.56/x
  3. Step 3: Cross multiply
    135,309.20x = 186,681.48 × 78,708.56
  4. Step 4: Simplify right side
    135,309.20x = 14,693,430,469.47
  5. Step 5: Solve for x
    x = 14,693,430,469.47/135,309.20
  6. Step 6: Final answer
    x = 108,591.51

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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.