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Finding the Fourth Proportional to 66,843.94, 92,244.64 and 39,987.58

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Solution

The fourth proportional to 66,843.94, 92,244.64 and 39,987.58 is: 55,182.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,843.94 : 92,244.64 = 39,987.58 : x
  2. Step 2: Convert to fraction form
    66,843.94/92,244.64 = 39,987.58/x
  3. Step 3: Cross multiply
    66,843.94x = 92,244.64 × 39,987.58
  4. Step 4: Simplify right side
    66,843.94x = 3,688,639,921.57
  5. Step 5: Solve for x
    x = 3,688,639,921.57/66,843.94
  6. Step 6: Final answer
    x = 55,182.86

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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.