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Finding the Fourth Proportional to 73,209.90, 109,842.18 and 28,867.56

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Solution

The fourth proportional to 73,209.90, 109,842.18 and 28,867.56 is: 43,312.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,209.90 : 109,842.18 = 28,867.56 : x
  2. Step 2: Convert to fraction form
    73,209.90/109,842.18 = 28,867.56/x
  3. Step 3: Cross multiply
    73,209.90x = 109,842.18 × 28,867.56
  4. Step 4: Simplify right side
    73,209.90x = 3,170,875,721.68
  5. Step 5: Solve for x
    x = 3,170,875,721.68/73,209.90
  6. Step 6: Final answer
    x = 43,312.12

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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.