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Finding the Fourth Proportional to 98,081.32, 135,367.32 and 55,630.84

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Solution

The fourth proportional to 98,081.32, 135,367.32 and 55,630.84 is: 76,779.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,081.32 : 135,367.32 = 55,630.84 : x
  2. Step 2: Convert to fraction form
    98,081.32/135,367.32 = 55,630.84/x
  3. Step 3: Cross multiply
    98,081.32x = 135,367.32 × 55,630.84
  4. Step 4: Simplify right side
    98,081.32x = 7,530,597,720.15
  5. Step 5: Solve for x
    x = 7,530,597,720.15/98,081.32
  6. Step 6: Final answer
    x = 76,779.12

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1.5x scale

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.