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Finding the Fourth Proportional to 339,781.60, 509,672.40 and 103,123.90

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Solution

The fourth proportional to 339,781.60, 509,672.40 and 103,123.90 is: 154,685.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    339,781.60 : 509,672.40 = 103,123.90 : x
  2. Step 2: Convert to fraction form
    339,781.60/509,672.40 = 103,123.90/x
  3. Step 3: Cross multiply
    339,781.60x = 509,672.40 × 103,123.90
  4. Step 4: Simplify right side
    339,781.60x = 52,559,405,610.36
  5. Step 5: Solve for x
    x = 52,559,405,610.36/339,781.60
  6. Step 6: Final answer
    x = 154,685.85

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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.