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Finding the Fourth Proportional to 262,612.68, 393,834.78 and 85,076.88

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Solution

The fourth proportional to 262,612.68, 393,834.78 and 85,076.88 is: 127,588.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    262,612.68 : 393,834.78 = 85,076.88 : x
  2. Step 2: Convert to fraction form
    262,612.68/393,834.78 = 85,076.88/x
  3. Step 3: Cross multiply
    262,612.68x = 393,834.78 × 85,076.88
  4. Step 4: Simplify right side
    262,612.68x = 33,506,234,317.89
  5. Step 5: Solve for x
    x = 33,506,234,317.89/262,612.68
  6. Step 6: Final answer
    x = 127,588.03

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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.