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Finding the Fourth Proportional to 100,852.80, 151,279.20 and 72,859.20

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Solution

The fourth proportional to 100,852.80, 151,279.20 and 72,859.20 is: 109,288.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,852.80 : 151,279.20 = 72,859.20 : x
  2. Step 2: Convert to fraction form
    100,852.80/151,279.20 = 72,859.20/x
  3. Step 3: Cross multiply
    100,852.80x = 151,279.20 × 72,859.20
  4. Step 4: Simplify right side
    100,852.80x = 11,022,081,488.64
  5. Step 5: Solve for x
    x = 11,022,081,488.64/100,852.80
  6. Step 6: Final answer
    x = 109,288.80

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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.