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Finding the Fourth Proportional to 65,790.79, 98,692.43 and 18,405.89

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Solution

The fourth proportional to 65,790.79, 98,692.43 and 18,405.89 is: 27,610.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,790.79 : 98,692.43 = 18,405.89 : x
  2. Step 2: Convert to fraction form
    65,790.79/98,692.43 = 18,405.89/x
  3. Step 3: Cross multiply
    65,790.79x = 98,692.43 × 18,405.89
  4. Step 4: Simplify right side
    65,790.79x = 1,816,521,424.92
  5. Step 5: Solve for x
    x = 1,816,521,424.92/65,790.79
  6. Step 6: Final answer
    x = 27,610.58

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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.