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Finding the Fourth Proportional to 120,903.90, 169,403.70 and 120,903.90

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Solution

The fourth proportional to 120,903.90, 169,403.70 and 120,903.90 is: 169,403.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,903.90 : 169,403.70 = 120,903.90 : x
  2. Step 2: Convert to fraction form
    120,903.90/169,403.70 = 120,903.90/x
  3. Step 3: Cross multiply
    120,903.90x = 169,403.70 × 120,903.90
  4. Step 4: Simplify right side
    120,903.90x = 20,481,568,004.43
  5. Step 5: Solve for x
    x = 20,481,568,004.43/120,903.90
  6. Step 6: Final answer
    x = 169,403.70

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.