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Finding the Fourth Proportional to 81,393.70, 112,317.96 and 45,575.50

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Solution

The fourth proportional to 81,393.70, 112,317.96 and 45,575.50 is: 62,891.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,393.70 : 112,317.96 = 45,575.50 : x
  2. Step 2: Convert to fraction form
    81,393.70/112,317.96 = 45,575.50/x
  3. Step 3: Cross multiply
    81,393.70x = 112,317.96 × 45,575.50
  4. Step 4: Simplify right side
    81,393.70x = 5,118,947,185.98
  5. Step 5: Solve for x
    x = 5,118,947,185.98/81,393.70
  6. Step 6: Final answer
    x = 62,891.20

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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.