Home / 85,660.80-118,128.96-66,791.04

Finding the Fourth Proportional to 85,660.80, 118,128.96 and 66,791.04

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Solution

The fourth proportional to 85,660.80, 118,128.96 and 66,791.04 is: 92,106.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,660.80 : 118,128.96 = 66,791.04 : x
  2. Step 2: Convert to fraction form
    85,660.80/118,128.96 = 66,791.04/x
  3. Step 3: Cross multiply
    85,660.80x = 118,128.96 × 66,791.04
  4. Step 4: Simplify right side
    85,660.80x = 7,889,956,092.52
  5. Step 5: Solve for x
    x = 7,889,956,092.52/85,660.80
  6. Step 6: Final answer
    x = 92,106.96

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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.