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Finding the Fourth Proportional to 103,540.88, 155,311.53 and 28,661.24

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Solution

The fourth proportional to 103,540.88, 155,311.53 and 28,661.24 is: 42,991.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,540.88 : 155,311.53 = 28,661.24 : x
  2. Step 2: Convert to fraction form
    103,540.88/155,311.53 = 28,661.24/x
  3. Step 3: Cross multiply
    103,540.88x = 155,311.53 × 28,661.24
  4. Step 4: Simplify right side
    103,540.88x = 4,451,421,036.10
  5. Step 5: Solve for x
    x = 4,451,421,036.10/103,540.88
  6. Step 6: Final answer
    x = 42,991.92

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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.