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Finding the Fourth Proportional to 103,980.58, 155,981.80 and 33,865.36

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Solution

The fourth proportional to 103,980.58, 155,981.80 and 33,865.36 is: 50,801.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,980.58 : 155,981.80 = 33,865.36 : x
  2. Step 2: Convert to fraction form
    103,980.58/155,981.80 = 33,865.36/x
  3. Step 3: Cross multiply
    103,980.58x = 155,981.80 × 33,865.36
  4. Step 4: Simplify right side
    103,980.58x = 5,282,379,462.83
  5. Step 5: Solve for x
    x = 5,282,379,462.83/103,980.58
  6. Step 6: Final answer
    x = 50,801.60

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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.