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Finding the Fourth Proportional to 66,737.80, 92,104.46 and 39,879.74

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Solution

The fourth proportional to 66,737.80, 92,104.46 and 39,879.74 is: 55,037.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,737.80 : 92,104.46 = 39,879.74 : x
  2. Step 2: Convert to fraction form
    66,737.80/92,104.46 = 39,879.74/x
  3. Step 3: Cross multiply
    66,737.80x = 92,104.46 × 39,879.74
  4. Step 4: Simplify right side
    66,737.80x = 3,673,101,917.64
  5. Step 5: Solve for x
    x = 3,673,101,917.64/66,737.80
  6. Step 6: Final answer
    x = 55,037.80

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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.