Home / 213,515.34-320,387.22-138,617.88

Finding the Fourth Proportional to 213,515.34, 320,387.22 and 138,617.88

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Solution

The fourth proportional to 213,515.34, 320,387.22 and 138,617.88 is: 208,000.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    213,515.34 : 320,387.22 = 138,617.88 : x
  2. Step 2: Convert to fraction form
    213,515.34/320,387.22 = 138,617.88/x
  3. Step 3: Cross multiply
    213,515.34x = 320,387.22 × 138,617.88
  4. Step 4: Simplify right side
    213,515.34x = 44,411,397,215.49
  5. Step 5: Solve for x
    x = 44,411,397,215.49/213,515.34
  6. Step 6: Final answer
    x = 208,000.97

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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.