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Finding the Fourth Proportional to 268,455.70, 402,685.97 and 81,467.20

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Solution

The fourth proportional to 268,455.70, 402,685.97 and 81,467.20 is: 122,201.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    268,455.70 : 402,685.97 = 81,467.20 : x
  2. Step 2: Convert to fraction form
    268,455.70/402,685.97 = 81,467.20/x
  3. Step 3: Cross multiply
    268,455.70x = 402,685.97 × 81,467.20
  4. Step 4: Simplify right side
    268,455.70x = 32,805,698,455.18
  5. Step 5: Solve for x
    x = 32,805,698,455.18/268,455.70
  6. Step 6: Final answer
    x = 122,201.53

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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.