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Finding the Fourth Proportional to 85,304.96, 117,839.88 and 80,820.80

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Solution

The fourth proportional to 85,304.96, 117,839.88 and 80,820.80 is: 111,645.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,304.96 : 117,839.88 = 80,820.80 : x
  2. Step 2: Convert to fraction form
    85,304.96/117,839.88 = 80,820.80/x
  3. Step 3: Cross multiply
    85,304.96x = 117,839.88 × 80,820.80
  4. Step 4: Simplify right side
    85,304.96x = 9,523,913,373.50
  5. Step 5: Solve for x
    x = 9,523,913,373.50/85,304.96
  6. Step 6: Final answer
    x = 111,645.48

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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.