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Finding the Fourth Proportional to 85,781.25, 128,680.88 and 23,451.75

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Solution

The fourth proportional to 85,781.25, 128,680.88 and 23,451.75 is: 35,180.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,781.25 : 128,680.88 = 23,451.75 : x
  2. Step 2: Convert to fraction form
    85,781.25/128,680.88 = 23,451.75/x
  3. Step 3: Cross multiply
    85,781.25x = 128,680.88 × 23,451.75
  4. Step 4: Simplify right side
    85,781.25x = 3,017,791,710.28
  5. Step 5: Solve for x
    x = 3,017,791,710.28/85,781.25
  6. Step 6: Final answer
    x = 35,180.09

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.