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Finding the Fourth Proportional to 73,009.70, 109,514.55 and 66,443.30

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Solution

The fourth proportional to 73,009.70, 109,514.55 and 66,443.30 is: 99,664.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,009.70 : 109,514.55 = 66,443.30 : x
  2. Step 2: Convert to fraction form
    73,009.70/109,514.55 = 66,443.30/x
  3. Step 3: Cross multiply
    73,009.70x = 109,514.55 × 66,443.30
  4. Step 4: Simplify right side
    73,009.70x = 7,276,508,100.02
  5. Step 5: Solve for x
    x = 7,276,508,100.02/73,009.70
  6. Step 6: Final answer
    x = 99,664.95

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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.