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Finding the Fourth Proportional to 81,563.67, 112,492.94 and 67,391.91

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Solution

The fourth proportional to 81,563.67, 112,492.94 and 67,391.91 is: 92,947.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,563.67 : 112,492.94 = 67,391.91 : x
  2. Step 2: Convert to fraction form
    81,563.67/112,492.94 = 67,391.91/x
  3. Step 3: Cross multiply
    81,563.67x = 112,492.94 × 67,391.91
  4. Step 4: Simplify right side
    81,563.67x = 7,581,113,751.16
  5. Step 5: Solve for x
    x = 7,581,113,751.16/81,563.67
  6. Step 6: Final answer
    x = 92,947.19

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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.