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Finding the Fourth Proportional to 101,620.40, 152,171.40 and 80,884.40

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Solution

The fourth proportional to 101,620.40, 152,171.40 and 80,884.40 is: 121,120.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,620.40 : 152,171.40 = 80,884.40 : x
  2. Step 2: Convert to fraction form
    101,620.40/152,171.40 = 80,884.40/x
  3. Step 3: Cross multiply
    101,620.40x = 152,171.40 × 80,884.40
  4. Step 4: Simplify right side
    101,620.40x = 12,308,292,386.16
  5. Step 5: Solve for x
    x = 12,308,292,386.16/101,620.40
  6. Step 6: Final answer
    x = 121,120.29

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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.