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Finding the Fourth Proportional to 81,673.92, 112,705.77 and 54,812.70

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Solution

The fourth proportional to 81,673.92, 112,705.77 and 54,812.70 is: 75,638.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,673.92 : 112,705.77 = 54,812.70 : x
  2. Step 2: Convert to fraction form
    81,673.92/112,705.77 = 54,812.70/x
  3. Step 3: Cross multiply
    81,673.92x = 112,705.77 × 54,812.70
  4. Step 4: Simplify right side
    81,673.92x = 6,177,707,559.28
  5. Step 5: Solve for x
    x = 6,177,707,559.28/81,673.92
  6. Step 6: Final answer
    x = 75,638.68

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1.5x scale

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.