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Finding the Fourth Proportional to 213,610.50, 320,485.88 and 87,356.92

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Solution

The fourth proportional to 213,610.50, 320,485.88 and 87,356.92 is: 131,064.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    213,610.50 : 320,485.88 = 87,356.92 : x
  2. Step 2: Convert to fraction form
    213,610.50/320,485.88 = 87,356.92/x
  3. Step 3: Cross multiply
    213,610.50x = 320,485.88 × 87,356.92
  4. Step 4: Simplify right side
    213,610.50x = 27,996,661,160.04
  5. Step 5: Solve for x
    x = 27,996,661,160.04/213,610.50
  6. Step 6: Final answer
    x = 131,064.07

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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.