Home / 259,206.30-388,809.45-72,217.80

Finding the Fourth Proportional to 259,206.30, 388,809.45 and 72,217.80

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Solution

The fourth proportional to 259,206.30, 388,809.45 and 72,217.80 is: 108,326.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,206.30 : 388,809.45 = 72,217.80 : x
  2. Step 2: Convert to fraction form
    259,206.30/388,809.45 = 72,217.80/x
  3. Step 3: Cross multiply
    259,206.30x = 388,809.45 × 72,217.80
  4. Step 4: Simplify right side
    259,206.30x = 28,078,963,098.21
  5. Step 5: Solve for x
    x = 28,078,963,098.21/259,206.30
  6. Step 6: Final answer
    x = 108,326.70

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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.