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Finding the Fourth Proportional to 169,689.21, 254,589.19 and 80,931.19

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Solution

The fourth proportional to 169,689.21, 254,589.19 and 80,931.19 is: 121,423.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    169,689.21 : 254,589.19 = 80,931.19 : x
  2. Step 2: Convert to fraction form
    169,689.21/254,589.19 = 80,931.19/x
  3. Step 3: Cross multiply
    169,689.21x = 254,589.19 × 80,931.19
  4. Step 4: Simplify right side
    169,689.21x = 20,604,204,950.80
  5. Step 5: Solve for x
    x = 20,604,204,950.80/169,689.21
  6. Step 6: Final answer
    x = 121,423.19

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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.