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Finding the Fourth Proportional to 140,988.96, 211,416.48 and 81,842.76

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Solution

The fourth proportional to 140,988.96, 211,416.48 and 81,842.76 is: 122,725.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    140,988.96 : 211,416.48 = 81,842.76 : x
  2. Step 2: Convert to fraction form
    140,988.96/211,416.48 = 81,842.76/x
  3. Step 3: Cross multiply
    140,988.96x = 211,416.48 × 81,842.76
  4. Step 4: Simplify right side
    140,988.96x = 17,302,908,232.68
  5. Step 5: Solve for x
    x = 17,302,908,232.68/140,988.96
  6. Step 6: Final answer
    x = 122,725.27

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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.