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Finding the Fourth Proportional to 103,530.69, 155,299.51 and 28,644.57

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Solution

The fourth proportional to 103,530.69, 155,299.51 and 28,644.57 is: 42,967.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,530.69 : 155,299.51 = 28,644.57 : x
  2. Step 2: Convert to fraction form
    103,530.69/155,299.51 = 28,644.57/x
  3. Step 3: Cross multiply
    103,530.69x = 155,299.51 × 28,644.57
  4. Step 4: Simplify right side
    103,530.69x = 4,448,487,720.97
  5. Step 5: Solve for x
    x = 4,448,487,720.97/103,530.69
  6. Step 6: Final answer
    x = 42,967.82

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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.