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Finding the Fourth Proportional to 169,689.72, 254,589.94 and 80,931.69

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Solution

The fourth proportional to 169,689.72, 254,589.94 and 80,931.69 is: 121,423.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    169,689.72 : 254,589.94 = 80,931.69 : x
  2. Step 2: Convert to fraction form
    169,689.72/254,589.94 = 80,931.69/x
  3. Step 3: Cross multiply
    169,689.72x = 254,589.94 × 80,931.69
  4. Step 4: Simplify right side
    169,689.72x = 20,604,392,828.25
  5. Step 5: Solve for x
    x = 20,604,392,828.25/169,689.72
  6. Step 6: Final answer
    x = 121,423.93

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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.