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Finding the Fourth Proportional to 201,570.88, 278,110.10 and 129,992

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Solution

The fourth proportional to 201,570.88, 278,110.10 and 129,992 is: 179,351.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    201,570.88 : 278,110.10 = 129,992 : x
  2. Step 2: Convert to fraction form
    201,570.88/278,110.10 = 129,992/x
  3. Step 3: Cross multiply
    201,570.88x = 278,110.10 × 129,992
  4. Step 4: Simplify right side
    201,570.88x = 36,152,088,119.20
  5. Step 5: Solve for x
    x = 36,152,088,119.20/201,570.88
  6. Step 6: Final answer
    x = 179,351.74

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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.