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Finding the Fourth Proportional to 103,651.88, 155,478.69 and 28,777.86

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Solution

The fourth proportional to 103,651.88, 155,478.69 and 28,777.86 is: 43,167.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,651.88 : 155,478.69 = 28,777.86 : x
  2. Step 2: Convert to fraction form
    103,651.88/155,478.69 = 28,777.86/x
  3. Step 3: Cross multiply
    103,651.88x = 155,478.69 × 28,777.86
  4. Step 4: Simplify right side
    103,651.88x = 4,474,343,973.80
  5. Step 5: Solve for x
    x = 4,474,343,973.80/103,651.88
  6. Step 6: Final answer
    x = 43,167.03

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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.