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Finding the Fourth Proportional to 73,842.30, 110,763.45 and 68,139.90

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Solution

The fourth proportional to 73,842.30, 110,763.45 and 68,139.90 is: 102,209.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,842.30 : 110,763.45 = 68,139.90 : x
  2. Step 2: Convert to fraction form
    73,842.30/110,763.45 = 68,139.90/x
  3. Step 3: Cross multiply
    73,842.30x = 110,763.45 × 68,139.90
  4. Step 4: Simplify right side
    73,842.30x = 7,547,410,406.66
  5. Step 5: Solve for x
    x = 7,547,410,406.66/73,842.30
  6. Step 6: Final answer
    x = 102,209.85

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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.