Home / 135,280.88-186,733.68-78,739.76

Finding the Fourth Proportional to 135,280.88, 186,733.68 and 78,739.76

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Solution

The fourth proportional to 135,280.88, 186,733.68 and 78,739.76 is: 108,687.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,280.88 : 186,733.68 = 78,739.76 : x
  2. Step 2: Convert to fraction form
    135,280.88/186,733.68 = 78,739.76/x
  3. Step 3: Cross multiply
    135,280.88x = 186,733.68 × 78,739.76
  4. Step 4: Simplify right side
    135,280.88x = 14,703,365,147.12
  5. Step 5: Solve for x
    x = 14,703,365,147.12/135,280.88
  6. Step 6: Final answer
    x = 108,687.68

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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.