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Finding the Fourth Proportional to 65,674,972.80, 98,521,790.40 and 20,232,028.80

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Solution

The fourth proportional to 65,674,972.80, 98,521,790.40 and 20,232,028.80 is: 30,350,917.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,674,972.80 : 98,521,790.40 = 20,232,028.80 : x
  2. Step 2: Convert to fraction form
    65,674,972.80/98,521,790.40 = 20,232,028.80/x
  3. Step 3: Cross multiply
    65,674,972.80x = 98,521,790.40 × 20,232,028.80
  4. Step 4: Simplify right side
    65,674,972.80x = 1,993,295,700,800,363.75
  5. Step 5: Solve for x
    x = 1,993,295,700,800,363.75/65,674,972.80
  6. Step 6: Final answer
    x = 30,350,917.80

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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.