Home / 258,826.30-388,220.88-81,384.05

Finding the Fourth Proportional to 258,826.30, 388,220.88 and 81,384.05

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Solution

The fourth proportional to 258,826.30, 388,220.88 and 81,384.05 is: 122,070.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,826.30 : 388,220.88 = 81,384.05 : x
  2. Step 2: Convert to fraction form
    258,826.30/388,220.88 = 81,384.05/x
  3. Step 3: Cross multiply
    258,826.30x = 388,220.88 × 81,384.05
  4. Step 4: Simplify right side
    258,826.30x = 31,594,987,508.96
  5. Step 5: Solve for x
    x = 31,594,987,508.96/258,826.30
  6. Step 6: Final answer
    x = 122,070.24

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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.