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Finding the Fourth Proportional to 117,390.40, 175,999.20 and 79,856.80

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Solution

The fourth proportional to 117,390.40, 175,999.20 and 79,856.80 is: 119,726.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,390.40 : 175,999.20 = 79,856.80 : x
  2. Step 2: Convert to fraction form
    117,390.40/175,999.20 = 79,856.80/x
  3. Step 3: Cross multiply
    117,390.40x = 175,999.20 × 79,856.80
  4. Step 4: Simplify right side
    117,390.40x = 14,054,732,914.56
  5. Step 5: Solve for x
    x = 14,054,732,914.56/117,390.40
  6. Step 6: Final answer
    x = 119,726.42

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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.