Home / 135,336.48-186,689.28-78,741.60

Finding the Fourth Proportional to 135,336.48, 186,689.28 and 78,741.60

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Solution

The fourth proportional to 135,336.48, 186,689.28 and 78,741.60 is: 108,619.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,336.48 : 186,689.28 = 78,741.60 : x
  2. Step 2: Convert to fraction form
    135,336.48/186,689.28 = 78,741.60/x
  3. Step 3: Cross multiply
    135,336.48x = 186,689.28 × 78,741.60
  4. Step 4: Simplify right side
    135,336.48x = 14,700,212,610.05
  5. Step 5: Solve for x
    x = 14,700,212,610.05/135,336.48
  6. Step 6: Final answer
    x = 108,619.74

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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.