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Finding the Fourth Proportional to 122,709.45, 169,369.11 and 75,002.79

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Solution

The fourth proportional to 122,709.45, 169,369.11 and 75,002.79 is: 103,522.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,709.45 : 169,369.11 = 75,002.79 : x
  2. Step 2: Convert to fraction form
    122,709.45/169,369.11 = 75,002.79/x
  3. Step 3: Cross multiply
    122,709.45x = 169,369.11 × 75,002.79
  4. Step 4: Simplify right side
    122,709.45x = 12,703,155,789.82
  5. Step 5: Solve for x
    x = 12,703,155,789.82/122,709.45
  6. Step 6: Final answer
    x = 103,522.23

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1.5x scale

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.