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Finding the Fourth Proportional to 85,115.10, 127,672.65 and 75,783.90

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Solution

The fourth proportional to 85,115.10, 127,672.65 and 75,783.90 is: 113,675.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,115.10 : 127,672.65 = 75,783.90 : x
  2. Step 2: Convert to fraction form
    85,115.10/127,672.65 = 75,783.90/x
  3. Step 3: Cross multiply
    85,115.10x = 127,672.65 × 75,783.90
  4. Step 4: Simplify right side
    85,115.10x = 9,675,531,340.34
  5. Step 5: Solve for x
    x = 9,675,531,340.34/85,115.10
  6. Step 6: Final answer
    x = 113,675.85

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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.