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Finding the Fourth Proportional to 140,212.80, 210,376.80 and 51,508.80

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Solution

The fourth proportional to 140,212.80, 210,376.80 and 51,508.80 is: 77,284.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    140,212.80 : 210,376.80 = 51,508.80 : x
  2. Step 2: Convert to fraction form
    140,212.80/210,376.80 = 51,508.80/x
  3. Step 3: Cross multiply
    140,212.80x = 210,376.80 × 51,508.80
  4. Step 4: Simplify right side
    140,212.80x = 10,836,256,515.84
  5. Step 5: Solve for x
    x = 10,836,256,515.84/140,212.80
  6. Step 6: Final answer
    x = 77,284.36

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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.