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Finding the Fourth Proportional to 140,017,811.20, 210,026,716.80 and 120,870,188.80

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Solution

The fourth proportional to 140,017,811.20, 210,026,716.80 and 120,870,188.80 is: 181,305,283.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    140,017,811.20 : 210,026,716.80 = 120,870,188.80 : x
  2. Step 2: Convert to fraction form
    140,017,811.20/210,026,716.80 = 120,870,188.80/x
  3. Step 3: Cross multiply
    140,017,811.20x = 210,026,716.80 × 120,870,188.80
  4. Step 4: Simplify right side
    140,017,811.20x = 25,385,968,912,660,132
  5. Step 5: Solve for x
    x = 25,385,968,912,660,132/140,017,811.20
  6. Step 6: Final answer
    x = 181,305,283.20

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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.