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Finding the Fourth Proportional to 85,310.82, 127,966.20 and 45,813.60

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Solution

The fourth proportional to 85,310.82, 127,966.20 and 45,813.60 is: 68,720.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,310.82 : 127,966.20 = 45,813.60 : x
  2. Step 2: Convert to fraction form
    85,310.82/127,966.20 = 45,813.60/x
  3. Step 3: Cross multiply
    85,310.82x = 127,966.20 × 45,813.60
  4. Step 4: Simplify right side
    85,310.82x = 5,862,592,300.32
  5. Step 5: Solve for x
    x = 5,862,592,300.32/85,310.82
  6. Step 6: Final answer
    x = 68,720.38

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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.