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Finding the Fourth Proportional to 458,455.90, 687,651.39 and 121,489.10

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Solution

The fourth proportional to 458,455.90, 687,651.39 and 121,489.10 is: 182,225.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    458,455.90 : 687,651.39 = 121,489.10 : x
  2. Step 2: Convert to fraction form
    458,455.90/687,651.39 = 121,489.10/x
  3. Step 3: Cross multiply
    458,455.90x = 687,651.39 × 121,489.10
  4. Step 4: Simplify right side
    458,455.90x = 83,542,145,046.59
  5. Step 5: Solve for x
    x = 83,542,145,046.59/458,455.90
  6. Step 6: Final answer
    x = 182,225.04

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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.