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Finding the Fourth Proportional to 188,909.64, 260,610.96 and 127,636.05

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Solution

The fourth proportional to 188,909.64, 260,610.96 and 127,636.05 is: 176,080.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    188,909.64 : 260,610.96 = 127,636.05 : x
  2. Step 2: Convert to fraction form
    188,909.64/260,610.96 = 127,636.05/x
  3. Step 3: Cross multiply
    188,909.64x = 260,610.96 × 127,636.05
  4. Step 4: Simplify right side
    188,909.64x = 33,263,353,521.11
  5. Step 5: Solve for x
    x = 33,263,353,521.11/188,909.64
  6. Step 6: Final answer
    x = 176,080.76

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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.