Home / 210,500.12-290,489.82-115,006.80

Finding the Fourth Proportional to 210,500.12, 290,489.82 and 115,006.80

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Solution

The fourth proportional to 210,500.12, 290,489.82 and 115,006.80 is: 158,709.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,500.12 : 290,489.82 = 115,006.80 : x
  2. Step 2: Convert to fraction form
    210,500.12/290,489.82 = 115,006.80/x
  3. Step 3: Cross multiply
    210,500.12x = 290,489.82 × 115,006.80
  4. Step 4: Simplify right side
    210,500.12x = 33,408,304,630.78
  5. Step 5: Solve for x
    x = 33,408,304,630.78/210,500.12
  6. Step 6: Final answer
    x = 158,709.20

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.