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Finding the Fourth Proportional to 148,779.92, 205,315.65 and 80,796.42

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Solution

The fourth proportional to 148,779.92, 205,315.65 and 80,796.42 is: 111,498.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    148,779.92 : 205,315.65 = 80,796.42 : x
  2. Step 2: Convert to fraction form
    148,779.92/205,315.65 = 80,796.42/x
  3. Step 3: Cross multiply
    148,779.92x = 205,315.65 × 80,796.42
  4. Step 4: Simplify right side
    148,779.92x = 16,588,769,489.97
  5. Step 5: Solve for x
    x = 16,588,769,489.97/148,779.92
  6. Step 6: Final answer
    x = 111,498.72

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.