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Finding the Fourth Proportional to 122,849.72, 169,532.04 and 69,135.64

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Solution

The fourth proportional to 122,849.72, 169,532.04 and 69,135.64 is: 95,406.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,849.72 : 169,532.04 = 69,135.64 : x
  2. Step 2: Convert to fraction form
    122,849.72/169,532.04 = 69,135.64/x
  3. Step 3: Cross multiply
    122,849.72x = 169,532.04 × 69,135.64
  4. Step 4: Simplify right side
    122,849.72x = 11,720,706,085.91
  5. Step 5: Solve for x
    x = 11,720,706,085.91/122,849.72
  6. Step 6: Final answer
    x = 95,406.86

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.