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Finding the Fourth Proportional to 85,935.80, 128,903.70 and 23,612.60

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Solution

The fourth proportional to 85,935.80, 128,903.70 and 23,612.60 is: 35,418.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,935.80 : 128,903.70 = 23,612.60 : x
  2. Step 2: Convert to fraction form
    85,935.80/128,903.70 = 23,612.60/x
  3. Step 3: Cross multiply
    85,935.80x = 128,903.70 × 23,612.60
  4. Step 4: Simplify right side
    85,935.80x = 3,043,751,506.62
  5. Step 5: Solve for x
    x = 3,043,751,506.62/85,935.80
  6. Step 6: Final answer
    x = 35,418.90

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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.