Home / 258,934.80-388,402.20-71,946.30

Finding the Fourth Proportional to 258,934.80, 388,402.20 and 71,946.30

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Solution

The fourth proportional to 258,934.80, 388,402.20 and 71,946.30 is: 107,919.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,934.80 : 388,402.20 = 71,946.30 : x
  2. Step 2: Convert to fraction form
    258,934.80/388,402.20 = 71,946.30/x
  3. Step 3: Cross multiply
    258,934.80x = 388,402.20 × 71,946.30
  4. Step 4: Simplify right side
    258,934.80x = 27,944,101,201.86
  5. Step 5: Solve for x
    x = 27,944,101,201.86/258,934.80
  6. Step 6: Final answer
    x = 107,919.45

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1.5x scale

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.