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Finding the Fourth Proportional to 81,009.40, 121,514.10 and 73,233.40

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Solution

The fourth proportional to 81,009.40, 121,514.10 and 73,233.40 is: 109,850.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,009.40 : 121,514.10 = 73,233.40 : x
  2. Step 2: Convert to fraction form
    81,009.40/121,514.10 = 73,233.40/x
  3. Step 3: Cross multiply
    81,009.40x = 121,514.10 × 73,233.40
  4. Step 4: Simplify right side
    81,009.40x = 8,898,890,690.94
  5. Step 5: Solve for x
    x = 8,898,890,690.94/81,009.40
  6. Step 6: Final answer
    x = 109,850.10

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1.5x scale

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.