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Finding the Fourth Proportional to 81,638.92, 112,653.05 and 45,832.87

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Solution

The fourth proportional to 81,638.92, 112,653.05 and 45,832.87 is: 63,244.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,638.92 : 112,653.05 = 45,832.87 : x
  2. Step 2: Convert to fraction form
    81,638.92/112,653.05 = 45,832.87/x
  3. Step 3: Cross multiply
    81,638.92x = 112,653.05 × 45,832.87
  4. Step 4: Simplify right side
    81,638.92x = 5,163,212,595.75
  5. Step 5: Solve for x
    x = 5,163,212,595.75/81,638.92
  6. Step 6: Final answer
    x = 63,244.50

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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.