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Finding the Fourth Proportional to 103,398.40, 155,126.40 and 50,809.60

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Solution

The fourth proportional to 103,398.40, 155,126.40 and 50,809.60 is: 76,228.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,398.40 : 155,126.40 = 50,809.60 : x
  2. Step 2: Convert to fraction form
    103,398.40/155,126.40 = 50,809.60/x
  3. Step 3: Cross multiply
    103,398.40x = 155,126.40 × 50,809.60
  4. Step 4: Simplify right side
    103,398.40x = 7,881,910,333.44
  5. Step 5: Solve for x
    x = 7,881,910,333.44/103,398.40
  6. Step 6: Final answer
    x = 76,228.55

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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.