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Finding the Fourth Proportional to 140,529.70, 210,794.55 and 81,480.70

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Solution

The fourth proportional to 140,529.70, 210,794.55 and 81,480.70 is: 122,221.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    140,529.70 : 210,794.55 = 81,480.70 : x
  2. Step 2: Convert to fraction form
    140,529.70/210,794.55 = 81,480.70/x
  3. Step 3: Cross multiply
    140,529.70x = 210,794.55 × 81,480.70
  4. Step 4: Simplify right side
    140,529.70x = 17,175,687,490.19
  5. Step 5: Solve for x
    x = 17,175,687,490.19/140,529.70
  6. Step 6: Final answer
    x = 122,221.05

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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.