Home / 258,890.31-388,379.75-118,660.95

Finding the Fourth Proportional to 258,890.31, 388,379.75 and 118,660.95

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Solution

The fourth proportional to 258,890.31, 388,379.75 and 118,660.95 is: 178,011.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,890.31 : 388,379.75 = 118,660.95 : x
  2. Step 2: Convert to fraction form
    258,890.31/388,379.75 = 118,660.95/x
  3. Step 3: Cross multiply
    258,890.31x = 388,379.75 × 118,660.95
  4. Step 4: Simplify right side
    258,890.31x = 46,085,509,502.46
  5. Step 5: Solve for x
    x = 46,085,509,502.46/258,890.31
  6. Step 6: Final answer
    x = 178,011.72

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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.