Home / 135,748.07-187,359.59-78,396.73

Finding the Fourth Proportional to 135,748.07, 187,359.59 and 78,396.73

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Solution

The fourth proportional to 135,748.07, 187,359.59 and 78,396.73 is: 108,203.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,748.07 : 187,359.59 = 78,396.73 : x
  2. Step 2: Convert to fraction form
    135,748.07/187,359.59 = 78,396.73/x
  3. Step 3: Cross multiply
    135,748.07x = 187,359.59 × 78,396.73
  4. Step 4: Simplify right side
    135,748.07x = 14,688,378,917.73
  5. Step 5: Solve for x
    x = 14,688,378,917.73/135,748.07
  6. Step 6: Final answer
    x = 108,203.23

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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.