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Finding the Fourth Proportional to 76,783.76, 115,184.87 and 72,584.72

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Solution

The fourth proportional to 76,783.76, 115,184.87 and 72,584.72 is: 108,885.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,783.76 : 115,184.87 = 72,584.72 : x
  2. Step 2: Convert to fraction form
    76,783.76/115,184.87 = 72,584.72/x
  3. Step 3: Cross multiply
    76,783.76x = 115,184.87 × 72,584.72
  4. Step 4: Simplify right side
    76,783.76x = 8,360,661,537.19
  5. Step 5: Solve for x
    x = 8,360,661,537.19/76,783.76
  6. Step 6: Final answer
    x = 108,885.81

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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.