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Finding the Fourth Proportional to 81,733.76, 112,855.57 and 65,888.94

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Solution

The fourth proportional to 81,733.76, 112,855.57 and 65,888.94 is: 90,977.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,733.76 : 112,855.57 = 65,888.94 : x
  2. Step 2: Convert to fraction form
    81,733.76/112,855.57 = 65,888.94/x
  3. Step 3: Cross multiply
    81,733.76x = 112,855.57 × 65,888.94
  4. Step 4: Simplify right side
    81,733.76x = 7,435,933,880.40
  5. Step 5: Solve for x
    x = 7,435,933,880.40/81,733.76
  6. Step 6: Final answer
    x = 90,977.51

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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.