Home / 258,890.56-388,380.12-118,661.20

Finding the Fourth Proportional to 258,890.56, 388,380.12 and 118,661.20

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Solution

The fourth proportional to 258,890.56, 388,380.12 and 118,661.20 is: 178,012.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,890.56 : 388,380.12 = 118,661.20 : x
  2. Step 2: Convert to fraction form
    258,890.56/388,380.12 = 118,661.20/x
  3. Step 3: Cross multiply
    258,890.56x = 388,380.12 × 118,661.20
  4. Step 4: Simplify right side
    258,890.56x = 46,085,651,095.34
  5. Step 5: Solve for x
    x = 46,085,651,095.34/258,890.56
  6. Step 6: Final answer
    x = 178,012.10

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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.