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Finding the Fourth Proportional to 260,051.70, 390,150.45 and 126,936.30

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Solution

The fourth proportional to 260,051.70, 390,150.45 and 126,936.30 is: 190,440.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,051.70 : 390,150.45 = 126,936.30 : x
  2. Step 2: Convert to fraction form
    260,051.70/390,150.45 = 126,936.30/x
  3. Step 3: Cross multiply
    260,051.70x = 390,150.45 × 126,936.30
  4. Step 4: Simplify right side
    260,051.70x = 49,524,254,566.34
  5. Step 5: Solve for x
    x = 49,524,254,566.34/260,051.70
  6. Step 6: Final answer
    x = 190,440.03

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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.