Home / 258,557.25-387,834.60-66,431.52

Finding the Fourth Proportional to 258,557.25, 387,834.60 and 66,431.52

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Solution

The fourth proportional to 258,557.25, 387,834.60 and 66,431.52 is: 99,646.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,557.25 : 387,834.60 = 66,431.52 : x
  2. Step 2: Convert to fraction form
    258,557.25/387,834.60 = 66,431.52/x
  3. Step 3: Cross multiply
    258,557.25x = 387,834.60 × 66,431.52
  4. Step 4: Simplify right side
    258,557.25x = 25,764,441,986.59
  5. Step 5: Solve for x
    x = 25,764,441,986.59/258,557.25
  6. Step 6: Final answer
    x = 99,646.95

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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.