Home / 213,755.18-320,632.52-85,729.23

Finding the Fourth Proportional to 213,755.18, 320,632.52 and 85,729.23

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Solution

The fourth proportional to 213,755.18, 320,632.52 and 85,729.23 is: 128,593.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    213,755.18 : 320,632.52 = 85,729.23 : x
  2. Step 2: Convert to fraction form
    213,755.18/320,632.52 = 85,729.23/x
  3. Step 3: Cross multiply
    213,755.18x = 320,632.52 × 85,729.23
  4. Step 4: Simplify right side
    213,755.18x = 27,487,578,623.91
  5. Step 5: Solve for x
    x = 27,487,578,623.91/213,755.18
  6. Step 6: Final answer
    x = 128,593.75

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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.