Home / 258,745.12-387,986.40-118,383.46

Finding the Fourth Proportional to 258,745.12, 387,986.40 and 118,383.46

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Solution

The fourth proportional to 258,745.12, 387,986.40 and 118,383.46 is: 177,515.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,745.12 : 387,986.40 = 118,383.46 : x
  2. Step 2: Convert to fraction form
    258,745.12/387,986.40 = 118,383.46/x
  3. Step 3: Cross multiply
    258,745.12x = 387,986.40 × 118,383.46
  4. Step 4: Simplify right side
    258,745.12x = 45,931,172,464.94
  5. Step 5: Solve for x
    x = 45,931,172,464.94/258,745.12
  6. Step 6: Final answer
    x = 177,515.13

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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.