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Finding the Fourth Proportional to 81,645.87, 112,673.40 and 45,838.62

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Solution

The fourth proportional to 81,645.87, 112,673.40 and 45,838.62 is: 63,258.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,645.87 : 112,673.40 = 45,838.62 : x
  2. Step 2: Convert to fraction form
    81,645.87/112,673.40 = 45,838.62/x
  3. Step 3: Cross multiply
    81,645.87x = 112,673.40 × 45,838.62
  4. Step 4: Simplify right side
    81,645.87x = 5,164,793,166.71
  5. Step 5: Solve for x
    x = 5,164,793,166.71/81,645.87
  6. Step 6: Final answer
    x = 63,258.47

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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.