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Finding the Fourth Proportional to 201,817.80, 302,726.70 and 138,832.20

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Solution

The fourth proportional to 201,817.80, 302,726.70 and 138,832.20 is: 208,248.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    201,817.80 : 302,726.70 = 138,832.20 : x
  2. Step 2: Convert to fraction form
    201,817.80/302,726.70 = 138,832.20/x
  3. Step 3: Cross multiply
    201,817.80x = 302,726.70 × 138,832.20
  4. Step 4: Simplify right side
    201,817.80x = 42,028,213,759.74
  5. Step 5: Solve for x
    x = 42,028,213,759.74/201,817.80
  6. Step 6: Final answer
    x = 208,248.30

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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.