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Finding the Fourth Proportional to 103,651.76, 155,478.50 and 28,777.74

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Solution

The fourth proportional to 103,651.76, 155,478.50 and 28,777.74 is: 43,166.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,651.76 : 155,478.50 = 28,777.74 : x
  2. Step 2: Convert to fraction form
    103,651.76/155,478.50 = 28,777.74/x
  3. Step 3: Cross multiply
    103,651.76x = 155,478.50 × 28,777.74
  4. Step 4: Simplify right side
    103,651.76x = 4,474,319,848.59
  5. Step 5: Solve for x
    x = 4,474,319,848.59/103,651.76
  6. Step 6: Final answer
    x = 43,166.85

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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.