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Finding the Fourth Proportional to 81,639.50, 112,654.80 and 45,822.51

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Solution

The fourth proportional to 81,639.50, 112,654.80 and 45,822.51 is: 63,230.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,639.50 : 112,654.80 = 45,822.51 : x
  2. Step 2: Convert to fraction form
    81,639.50/112,654.80 = 45,822.51/x
  3. Step 3: Cross multiply
    81,639.50x = 112,654.80 × 45,822.51
  4. Step 4: Simplify right side
    81,639.50x = 5,162,125,699.55
  5. Step 5: Solve for x
    x = 5,162,125,699.55/81,639.50
  6. Step 6: Final answer
    x = 63,230.74

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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.