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Finding the Fourth Proportional to 103,784.75, 155,677.28 and 28,905.11

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Solution

The fourth proportional to 103,784.75, 155,677.28 and 28,905.11 is: 43,357.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,784.75 : 155,677.28 = 28,905.11 : x
  2. Step 2: Convert to fraction form
    103,784.75/155,677.28 = 28,905.11/x
  3. Step 3: Cross multiply
    103,784.75x = 155,677.28 × 28,905.11
  4. Step 4: Simplify right side
    103,784.75x = 4,499,868,563.78
  5. Step 5: Solve for x
    x = 4,499,868,563.78/103,784.75
  6. Step 6: Final answer
    x = 43,357.71

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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.