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Finding the Fourth Proportional to 137,021.88, 205,531.92 and 70,480.56

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Solution

The fourth proportional to 137,021.88, 205,531.92 and 70,480.56 is: 105,720.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,021.88 : 205,531.92 = 70,480.56 : x
  2. Step 2: Convert to fraction form
    137,021.88/205,531.92 = 70,480.56/x
  3. Step 3: Cross multiply
    137,021.88x = 205,531.92 × 70,480.56
  4. Step 4: Simplify right side
    137,021.88x = 14,486,004,819.48
  5. Step 5: Solve for x
    x = 14,486,004,819.48/137,021.88
  6. Step 6: Final answer
    x = 105,720.38

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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.