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Finding the Fourth Proportional to 85,989.88, 118,570.20 and 55,735.48

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Solution

The fourth proportional to 85,989.88, 118,570.20 and 55,735.48 is: 76,852.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,989.88 : 118,570.20 = 55,735.48 : x
  2. Step 2: Convert to fraction form
    85,989.88/118,570.20 = 55,735.48/x
  3. Step 3: Cross multiply
    85,989.88x = 118,570.20 × 55,735.48
  4. Step 4: Simplify right side
    85,989.88x = 6,608,567,010.70
  5. Step 5: Solve for x
    x = 6,608,567,010.70/85,989.88
  6. Step 6: Final answer
    x = 76,852.85

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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.