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Finding the Fourth Proportional to 103,530.61, 155,299.39 and 28,644.49

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Solution

The fourth proportional to 103,530.61, 155,299.39 and 28,644.49 is: 42,967.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,530.61 : 155,299.39 = 28,644.49 : x
  2. Step 2: Convert to fraction form
    103,530.61/155,299.39 = 28,644.49/x
  3. Step 3: Cross multiply
    103,530.61x = 155,299.39 × 28,644.49
  4. Step 4: Simplify right side
    103,530.61x = 4,448,471,823.86
  5. Step 5: Solve for x
    x = 4,448,471,823.86/103,530.61
  6. Step 6: Final answer
    x = 42,967.70

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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.