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Finding the Fourth Proportional to 81,376.32, 112,292.88 and 45,558

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Solution

The fourth proportional to 81,376.32, 112,292.88 and 45,558 is: 62,866.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,376.32 : 112,292.88 = 45,558 : x
  2. Step 2: Convert to fraction form
    81,376.32/112,292.88 = 45,558/x
  3. Step 3: Cross multiply
    81,376.32x = 112,292.88 × 45,558
  4. Step 4: Simplify right side
    81,376.32x = 5,115,839,027.04
  5. Step 5: Solve for x
    x = 5,115,839,027.04/81,376.32
  6. Step 6: Final answer
    x = 62,866.43

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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.