Home / 213,965.63-321,008.42-85,971.79

Finding the Fourth Proportional to 213,965.63, 321,008.42 and 85,971.79

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Solution

The fourth proportional to 213,965.63, 321,008.42 and 85,971.79 is: 128,981.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    213,965.63 : 321,008.42 = 85,971.79 : x
  2. Step 2: Convert to fraction form
    213,965.63/321,008.42 = 85,971.79/x
  3. Step 3: Cross multiply
    213,965.63x = 321,008.42 × 85,971.79
  4. Step 4: Simplify right side
    213,965.63x = 27,597,669,088.66
  5. Step 5: Solve for x
    x = 27,597,669,088.66/213,965.63
  6. Step 6: Final answer
    x = 128,981.79

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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.