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Finding the Fourth Proportional to 85,242.32, 127,900.36 and 45,753.30

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Solution

The fourth proportional to 85,242.32, 127,900.36 and 45,753.30 is: 68,649.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,242.32 : 127,900.36 = 45,753.30 : x
  2. Step 2: Convert to fraction form
    85,242.32/127,900.36 = 45,753.30/x
  3. Step 3: Cross multiply
    85,242.32x = 127,900.36 × 45,753.30
  4. Step 4: Simplify right side
    85,242.32x = 5,851,863,820.64
  5. Step 5: Solve for x
    x = 5,851,863,820.64/85,242.32
  6. Step 6: Final answer
    x = 68,649.75

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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.