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Finding the Fourth Proportional to 81,730.58, 112,788.29 and 45,920.57

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Solution

The fourth proportional to 81,730.58, 112,788.29 and 45,920.57 is: 63,370.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,730.58 : 112,788.29 = 45,920.57 : x
  2. Step 2: Convert to fraction form
    81,730.58/112,788.29 = 45,920.57/x
  3. Step 3: Cross multiply
    81,730.58x = 112,788.29 × 45,920.57
  4. Step 4: Simplify right side
    81,730.58x = 5,179,302,116.99
  5. Step 5: Solve for x
    x = 5,179,302,116.99/81,730.58
  6. Step 6: Final answer
    x = 63,370.44

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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.