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Finding the Fourth Proportional to 81,980.62, 112,895.04 and 71,220.58

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Solution

The fourth proportional to 81,980.62, 112,895.04 and 71,220.58 is: 98,077.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,980.62 : 112,895.04 = 71,220.58 : x
  2. Step 2: Convert to fraction form
    81,980.62/112,895.04 = 71,220.58/x
  3. Step 3: Cross multiply
    81,980.62x = 112,895.04 × 71,220.58
  4. Step 4: Simplify right side
    81,980.62x = 8,040,450,227.92
  5. Step 5: Solve for x
    x = 8,040,450,227.92/81,980.62
  6. Step 6: Final answer
    x = 98,077.45

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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.