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Finding the Fourth Proportional to 85,202.48, 127,758.84 and 45,243.86

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Solution

The fourth proportional to 85,202.48, 127,758.84 and 45,243.86 is: 67,841.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,202.48 : 127,758.84 = 45,243.86 : x
  2. Step 2: Convert to fraction form
    85,202.48/127,758.84 = 45,243.86/x
  3. Step 3: Cross multiply
    85,202.48x = 127,758.84 × 45,243.86
  4. Step 4: Simplify right side
    85,202.48x = 5,780,303,070.72
  5. Step 5: Solve for x
    x = 5,780,303,070.72/85,202.48
  6. Step 6: Final answer
    x = 67,841.96

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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.