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Finding the Fourth Proportional to 81,450.96, 112,390.92 and 45,638.16

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Solution

The fourth proportional to 81,450.96, 112,390.92 and 45,638.16 is: 62,974.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,450.96 : 112,390.92 = 45,638.16 : x
  2. Step 2: Convert to fraction form
    81,450.96/112,390.92 = 45,638.16/x
  3. Step 3: Cross multiply
    81,450.96x = 112,390.92 × 45,638.16
  4. Step 4: Simplify right side
    81,450.96x = 5,129,314,789.51
  5. Step 5: Solve for x
    x = 5,129,314,789.51/81,450.96
  6. Step 6: Final answer
    x = 62,974.27

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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.