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Finding the Fourth Proportional to 123,576.60, 185,364.90 and 76,920.60

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Solution

The fourth proportional to 123,576.60, 185,364.90 and 76,920.60 is: 115,380.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,576.60 : 185,364.90 = 76,920.60 : x
  2. Step 2: Convert to fraction form
    123,576.60/185,364.90 = 76,920.60/x
  3. Step 3: Cross multiply
    123,576.60x = 185,364.90 × 76,920.60
  4. Step 4: Simplify right side
    123,576.60x = 14,258,379,326.94
  5. Step 5: Solve for x
    x = 14,258,379,326.94/123,576.60
  6. Step 6: Final answer
    x = 115,380.90

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1.5x scale

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.