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Finding the Fourth Proportional to 84,967.20, 127,418.40 and 25,783.20

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Solution

The fourth proportional to 84,967.20, 127,418.40 and 25,783.20 is: 38,664.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,967.20 : 127,418.40 = 25,783.20 : x
  2. Step 2: Convert to fraction form
    84,967.20/127,418.40 = 25,783.20/x
  3. Step 3: Cross multiply
    84,967.20x = 127,418.40 × 25,783.20
  4. Step 4: Simplify right side
    84,967.20x = 3,285,254,090.88
  5. Step 5: Solve for x
    x = 3,285,254,090.88/84,967.20
  6. Step 6: Final answer
    x = 38,664.97

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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.