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Finding the Fourth Proportional to 260,051.10, 390,076.65 and 126,951.90

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Solution

The fourth proportional to 260,051.10, 390,076.65 and 126,951.90 is: 190,427.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,051.10 : 390,076.65 = 126,951.90 : x
  2. Step 2: Convert to fraction form
    260,051.10/390,076.65 = 126,951.90/x
  3. Step 3: Cross multiply
    260,051.10x = 390,076.65 × 126,951.90
  4. Step 4: Simplify right side
    260,051.10x = 49,520,971,863.14
  5. Step 5: Solve for x
    x = 49,520,971,863.14/260,051.10
  6. Step 6: Final answer
    x = 190,427.85

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.