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Finding the Fourth Proportional to 81,292.61, 112,185.81 and 45,482.31

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Solution

The fourth proportional to 81,292.61, 112,185.81 and 45,482.31 is: 62,766.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,292.61 : 112,185.81 = 45,482.31 : x
  2. Step 2: Convert to fraction form
    81,292.61/112,185.81 = 45,482.31/x
  3. Step 3: Cross multiply
    81,292.61x = 112,185.81 × 45,482.31
  4. Step 4: Simplify right side
    81,292.61x = 5,102,469,788.02
  5. Step 5: Solve for x
    x = 5,102,469,788.02/81,292.61
  6. Step 6: Final answer
    x = 62,766.71

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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.