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Finding the Fourth Proportional to 81,158.90, 111,999.85 and 45,350.42

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Solution

The fourth proportional to 81,158.90, 111,999.85 and 45,350.42 is: 62,583.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,158.90 : 111,999.85 = 45,350.42 : x
  2. Step 2: Convert to fraction form
    81,158.90/111,999.85 = 45,350.42/x
  3. Step 3: Cross multiply
    81,158.90x = 111,999.85 × 45,350.42
  4. Step 4: Simplify right side
    81,158.90x = 5,079,240,237.44
  5. Step 5: Solve for x
    x = 5,079,240,237.44/81,158.90
  6. Step 6: Final answer
    x = 62,583.90

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.