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Finding the Fourth Proportional to 81,472.64, 112,436.72 and 45,674.16

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Solution

The fourth proportional to 81,472.64, 112,436.72 and 45,674.16 is: 63,032.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,472.64 : 112,436.72 = 45,674.16 : x
  2. Step 2: Convert to fraction form
    81,472.64/112,436.72 = 45,674.16/x
  3. Step 3: Cross multiply
    81,472.64x = 112,436.72 × 45,674.16
  4. Step 4: Simplify right side
    81,472.64x = 5,135,452,739.16
  5. Step 5: Solve for x
    x = 5,135,452,739.16/81,472.64
  6. Step 6: Final answer
    x = 63,032.85

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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.