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Finding the Fourth Proportional to 65,674,987.80, 98,521,812.90 and 20,232,043.80

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Solution

The fourth proportional to 65,674,987.80, 98,521,812.90 and 20,232,043.80 is: 30,350,940.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,674,987.80 : 98,521,812.90 = 20,232,043.80 : x
  2. Step 2: Convert to fraction form
    65,674,987.80/98,521,812.90 = 20,232,043.80/x
  3. Step 3: Cross multiply
    65,674,987.80x = 98,521,812.90 × 20,232,043.80
  4. Step 4: Simplify right side
    65,674,987.80x = 1,993,297,633,848,205.25
  5. Step 5: Solve for x
    x = 1,993,297,633,848,205.25/65,674,987.80
  6. Step 6: Final answer
    x = 30,350,940.30

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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.