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Finding the Fourth Proportional to 140,640.90, 210,963.52 and 45,870.68

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Solution

The fourth proportional to 140,640.90, 210,963.52 and 45,870.68 is: 68,806.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    140,640.90 : 210,963.52 = 45,870.68 : x
  2. Step 2: Convert to fraction form
    140,640.90/210,963.52 = 45,870.68/x
  3. Step 3: Cross multiply
    140,640.90x = 210,963.52 × 45,870.68
  4. Step 4: Simplify right side
    140,640.90x = 9,677,040,117.59
  5. Step 5: Solve for x
    x = 9,677,040,117.59/140,640.90
  6. Step 6: Final answer
    x = 68,806.73

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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.