Home / 135,112.64-186,449.88-78,519.68

Finding the Fourth Proportional to 135,112.64, 186,449.88 and 78,519.68

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Solution

The fourth proportional to 135,112.64, 186,449.88 and 78,519.68 is: 108,353.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,112.64 : 186,449.88 = 78,519.68 : x
  2. Step 2: Convert to fraction form
    135,112.64/186,449.88 = 78,519.68/x
  3. Step 3: Cross multiply
    135,112.64x = 186,449.88 × 78,519.68
  4. Step 4: Simplify right side
    135,112.64x = 14,639,984,913.64
  5. Step 5: Solve for x
    x = 14,639,984,913.64/135,112.64
  6. Step 6: Final answer
    x = 108,353.93

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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.