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Finding the Fourth Proportional to 213,538.80, 320,221.80 and 73,225.20

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Solution

The fourth proportional to 213,538.80, 320,221.80 and 73,225.20 is: 109,808.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    213,538.80 : 320,221.80 = 73,225.20 : x
  2. Step 2: Convert to fraction form
    213,538.80/320,221.80 = 73,225.20/x
  3. Step 3: Cross multiply
    213,538.80x = 320,221.80 × 73,225.20
  4. Step 4: Simplify right side
    213,538.80x = 23,448,305,349.36
  5. Step 5: Solve for x
    x = 23,448,305,349.36/213,538.80
  6. Step 6: Final answer
    x = 109,808.17

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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.