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Finding the Fourth Proportional to 458,664.60, 687,996.90 and 121,704.60

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Solution

The fourth proportional to 458,664.60, 687,996.90 and 121,704.60 is: 182,556.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    458,664.60 : 687,996.90 = 121,704.60 : x
  2. Step 2: Convert to fraction form
    458,664.60/687,996.90 = 121,704.60/x
  3. Step 3: Cross multiply
    458,664.60x = 687,996.90 × 121,704.60
  4. Step 4: Simplify right side
    458,664.60x = 83,732,387,515.74
  5. Step 5: Solve for x
    x = 83,732,387,515.74/458,664.60
  6. Step 6: Final answer
    x = 182,556.90

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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.