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Finding the Fourth Proportional to 199,909.40, 299,820.90 and 87,589.40

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Solution

The fourth proportional to 199,909.40, 299,820.90 and 87,589.40 is: 131,365.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    199,909.40 : 299,820.90 = 87,589.40 : x
  2. Step 2: Convert to fraction form
    199,909.40/299,820.90 = 87,589.40/x
  3. Step 3: Cross multiply
    199,909.40x = 299,820.90 × 87,589.40
  4. Step 4: Simplify right side
    199,909.40x = 26,261,132,738.46
  5. Step 5: Solve for x
    x = 26,261,132,738.46/199,909.40
  6. Step 6: Final answer
    x = 131,365.17

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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.