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Finding the Fourth Proportional to 81,671.68, 112,696.68 and 45,861.58

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Solution

The fourth proportional to 81,671.68, 112,696.68 and 45,861.58 is: 63,283.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,671.68 : 112,696.68 = 45,861.58 : x
  2. Step 2: Convert to fraction form
    81,671.68/112,696.68 = 45,861.58/x
  3. Step 3: Cross multiply
    81,671.68x = 112,696.68 × 45,861.58
  4. Step 4: Simplify right side
    81,671.68x = 5,168,447,805.55
  5. Step 5: Solve for x
    x = 5,168,447,805.55/81,671.68
  6. Step 6: Final answer
    x = 63,283.23

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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.