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Finding the Fourth Proportional to 80,998.80, 121,303.80 and 65,446.80

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Solution

The fourth proportional to 80,998.80, 121,303.80 and 65,446.80 is: 98,013.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,998.80 : 121,303.80 = 65,446.80 : x
  2. Step 2: Convert to fraction form
    80,998.80/121,303.80 = 65,446.80/x
  3. Step 3: Cross multiply
    80,998.80x = 121,303.80 × 65,446.80
  4. Step 4: Simplify right side
    80,998.80x = 7,938,945,537.84
  5. Step 5: Solve for x
    x = 7,938,945,537.84/80,998.80
  6. Step 6: Final answer
    x = 98,013.13

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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.