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Finding the Fourth Proportional to 81,455.52, 112,411.80 and 45,645.84

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Solution

The fourth proportional to 81,455.52, 112,411.80 and 45,645.84 is: 62,993.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,455.52 : 112,411.80 = 45,645.84 : x
  2. Step 2: Convert to fraction form
    81,455.52/112,411.80 = 45,645.84/x
  3. Step 3: Cross multiply
    81,455.52x = 112,411.80 × 45,645.84
  4. Step 4: Simplify right side
    81,455.52x = 5,131,131,036.91
  5. Step 5: Solve for x
    x = 5,131,131,036.91/81,455.52
  6. Step 6: Final answer
    x = 62,993.04

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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.