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Finding the Fourth Proportional to 81,158.22, 111,989.79 and 45,349.74

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Solution

The fourth proportional to 81,158.22, 111,989.79 and 45,349.74 is: 62,577.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,158.22 : 111,989.79 = 45,349.74 : x
  2. Step 2: Convert to fraction form
    81,158.22/111,989.79 = 45,349.74/x
  3. Step 3: Cross multiply
    81,158.22x = 111,989.79 × 45,349.74
  4. Step 4: Simplify right side
    81,158.22x = 5,078,707,859.15
  5. Step 5: Solve for x
    x = 5,078,707,859.15/81,158.22
  6. Step 6: Final answer
    x = 62,577.86

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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.