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Finding the Fourth Proportional to 260,123.40, 389,916.72 and 126,838.98

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Solution

The fourth proportional to 260,123.40, 389,916.72 and 126,838.98 is: 190,127.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,123.40 : 389,916.72 = 126,838.98 : x
  2. Step 2: Convert to fraction form
    260,123.40/389,916.72 = 126,838.98/x
  3. Step 3: Cross multiply
    260,123.40x = 389,916.72 × 126,838.98
  4. Step 4: Simplify right side
    260,123.40x = 49,456,639,049.75
  5. Step 5: Solve for x
    x = 49,456,639,049.75/260,123.40
  6. Step 6: Final answer
    x = 190,127.61

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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.