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Finding the Fourth Proportional to 140,103.81, 210,256.70 and 55,815.21

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Solution

The fourth proportional to 140,103.81, 210,256.70 and 55,815.21 is: 83,763.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    140,103.81 : 210,256.70 = 55,815.21 : x
  2. Step 2: Convert to fraction form
    140,103.81/210,256.70 = 55,815.21/x
  3. Step 3: Cross multiply
    140,103.81x = 210,256.70 × 55,815.21
  4. Step 4: Simplify right side
    140,103.81x = 11,735,521,585.33
  5. Step 5: Solve for x
    x = 11,735,521,585.33/140,103.81
  6. Step 6: Final answer
    x = 83,763.04

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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.