Home / 154,903.20-213,766.50-86,910.78

Finding the Fourth Proportional to 154,903.20, 213,766.50 and 86,910.78

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Solution

The fourth proportional to 154,903.20, 213,766.50 and 86,910.78 is: 119,936.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,903.20 : 213,766.50 = 86,910.78 : x
  2. Step 2: Convert to fraction form
    154,903.20/213,766.50 = 86,910.78/x
  3. Step 3: Cross multiply
    154,903.20x = 213,766.50 × 86,910.78
  4. Step 4: Simplify right side
    154,903.20x = 18,578,613,252.87
  5. Step 5: Solve for x
    x = 18,578,613,252.87/154,903.20
  6. Step 6: Final answer
    x = 119,936.92

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.