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Finding the Fourth Proportional to 109,796.80, 164,889.60 and 84,897.40

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Solution

The fourth proportional to 109,796.80, 164,889.60 and 84,897.40 is: 127,496.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,796.80 : 164,889.60 = 84,897.40 : x
  2. Step 2: Convert to fraction form
    109,796.80/164,889.60 = 84,897.40/x
  3. Step 3: Cross multiply
    109,796.80x = 164,889.60 × 84,897.40
  4. Step 4: Simplify right side
    109,796.80x = 13,998,698,327.04
  5. Step 5: Solve for x
    x = 13,998,698,327.04/109,796.80
  6. Step 6: Final answer
    x = 127,496.41

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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.