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Finding the Fourth Proportional to 81,672.34, 112,726.20 and 53,361.76

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Solution

The fourth proportional to 81,672.34, 112,726.20 and 53,361.76 is: 73,651.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,672.34 : 112,726.20 = 53,361.76 : x
  2. Step 2: Convert to fraction form
    81,672.34/112,726.20 = 53,361.76/x
  3. Step 3: Cross multiply
    81,672.34x = 112,726.20 × 53,361.76
  4. Step 4: Simplify right side
    81,672.34x = 6,015,268,430.11
  5. Step 5: Solve for x
    x = 6,015,268,430.11/81,672.34
  6. Step 6: Final answer
    x = 73,651.23

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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.