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Finding the Fourth Proportional to 84,940.10, 127,410.15 and 25,772.90

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Solution

The fourth proportional to 84,940.10, 127,410.15 and 25,772.90 is: 38,659.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,940.10 : 127,410.15 = 25,772.90 : x
  2. Step 2: Convert to fraction form
    84,940.10/127,410.15 = 25,772.90/x
  3. Step 3: Cross multiply
    84,940.10x = 127,410.15 × 25,772.90
  4. Step 4: Simplify right side
    84,940.10x = 3,283,729,054.94
  5. Step 5: Solve for x
    x = 3,283,729,054.94/84,940.10
  6. Step 6: Final answer
    x = 38,659.35

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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.