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Finding the Fourth Proportional to 140,881.98, 211,256.08 and 81,735.78

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Solution

The fourth proportional to 140,881.98, 211,256.08 and 81,735.78 is: 122,564.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    140,881.98 : 211,256.08 = 81,735.78 : x
  2. Step 2: Convert to fraction form
    140,881.98/211,256.08 = 81,735.78/x
  3. Step 3: Cross multiply
    140,881.98x = 211,256.08 × 81,735.78
  4. Step 4: Simplify right side
    140,881.98x = 17,267,180,478.54
  5. Step 5: Solve for x
    x = 17,267,180,478.54/140,881.98
  6. Step 6: Final answer
    x = 122,564.86

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1.5x scale

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.