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Finding the Fourth Proportional to 144,196.80, 216,169.92 and 69,279.36

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Solution

The fourth proportional to 144,196.80, 216,169.92 and 69,279.36 is: 103,858.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    144,196.80 : 216,169.92 = 69,279.36 : x
  2. Step 2: Convert to fraction form
    144,196.80/216,169.92 = 69,279.36/x
  3. Step 3: Cross multiply
    144,196.80x = 216,169.92 × 69,279.36
  4. Step 4: Simplify right side
    144,196.80x = 14,976,113,708.85
  5. Step 5: Solve for x
    x = 14,976,113,708.85/144,196.80
  6. Step 6: Final answer
    x = 103,858.85

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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.