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Finding the Fourth Proportional to 84,810.70, 127,216.05 and 25,640.20

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Solution

The fourth proportional to 84,810.70, 127,216.05 and 25,640.20 is: 38,460.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,810.70 : 127,216.05 = 25,640.20 : x
  2. Step 2: Convert to fraction form
    84,810.70/127,216.05 = 25,640.20/x
  3. Step 3: Cross multiply
    84,810.70x = 127,216.05 × 25,640.20
  4. Step 4: Simplify right side
    84,810.70x = 3,261,844,965.21
  5. Step 5: Solve for x
    x = 3,261,844,965.21/84,810.70
  6. Step 6: Final answer
    x = 38,460.30

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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.