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Finding the Fourth Proportional to 127,909.80, 191,919.90 and 68,676.24

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Solution

The fourth proportional to 127,909.80, 191,919.90 and 68,676.24 is: 103,044.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,909.80 : 191,919.90 = 68,676.24 : x
  2. Step 2: Convert to fraction form
    127,909.80/191,919.90 = 68,676.24/x
  3. Step 3: Cross multiply
    127,909.80x = 191,919.90 × 68,676.24
  4. Step 4: Simplify right side
    127,909.80x = 13,180,337,113.18
  5. Step 5: Solve for x
    x = 13,180,337,113.18/127,909.80
  6. Step 6: Final answer
    x = 103,044.00

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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.